Pete, reading this board over the last few years I can't I agree with that. The impression I have gotten from the majority of posts is that they want to (or suggest brands that allow it) save the costs of servicing. It's possible that it comes down to perception, as our perceptions are our reality.
I repaced all my SP and Apex regs due to the annual serving costs (upwards of $400) and to eliminate the bitter hatred I had for needing to keep paperwork in order to avoid paying even higher costs and the perceived hostile treatment by shop owners towards me if my paperwork was not in order (and the wait times to get them back). Between my many cylinders and regs, I was paying very close to $1,200 a year for VIP, O2 cleaning, and other annual servicing. I keep receipts, that's what it was in 2010 and 2011. I brought all of that down to about $200/year (2012 - not including the upfront tools/training costs).
So yes, it was ORIGINALLY about cost. But then standardization. But then I realized it's more about the freedom you gain being able to service your own equipment any time, any place. Anyone who thinks this is purely about cost is deceiving themselves. You'll spend more upfront but gain certain responsibilities and obligations (and time commitments) in the process that may not outweight the ease of just paying for it somewhere in some cases.
For those that asked about the tools and parts and so on, here's the inventory that I created as I bought everything and the prices I paid. This is minimal (I don't have a magnehelic or flow meter) but this is sufficient for my needs. Hope it helps someone (zero's mean I didn't order the item):
[TABLE="width: 489"]
[TR]
[TD]Item
[/TD]
[TD]Price
[/TD]
[TD]QTY
[/TD]
[TD]Total
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Class - SDI Cylinder & Valve Technician
[/TD]
[TD="align: right"]$250.00
[/TD]
[TD="align: right"][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]Class - TDI O2 Service Technician
[/TD]
[TD="align: right"]$250.00
[/TD]
[TD="align: right"][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]Class - TDI HOS Regularor Service Technician
[/TD]
[TD="align: right"]$250.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$250.00
[/TD]
[/TR]
[TR]
[TD]
Reg Savvy
[/TD]
[TD="align: right"]$32.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$32.00
[/TD]
[/TR]
[TR]
[TD]
1st Stg Handle
[/TD]
[TD="align: right"]$29.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$29.00
[/TD]
[/TR]
[TR]
[TD]
Dual Drive inline adj tool
[/TD]
[TD="align: right"]$69.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$69.00
[/TD]
[/TR]
[TR]
[TD]
ChristoLube
[/TD]
[TD="align: right"]$32.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$32.00
[/TD]
[/TR]
[TR]
[TD]
O-ring pick set, soft brass
[/TD]
[TD="align: right"]$12.50
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$12.50
[/TD]
[/TR]
[TR]
[TD]
O-ring pick set, 5 pieces
[/TD]
[TD="align: right"]$8.75
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$8.75
[/TD]
[/TR]
[TR]
[TD]
3/8" Drive Dial Torque Wrench
[/TD]
[TD="align: right"]$149.70
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$149.70
[/TD]
[/TR]
[TR]
[TD]
Hook pin spanner (1.5" / 1/8" pin)
[/TD]
[TD="align: right"]$9.76
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$9.76
[/TD]
[/TR]
[TR]
[TD]
Hook spanner #6
[/TD]
[TD="align: right"]$14.00
[/TD]
[TD="align: right"]2
[/TD]
[TD="align: right"]$28.00
[/TD]
[/TR]
[TR]
[TD]
Hook sppner pin 1/8" for #6
[/TD]
[TD="align: right"]$2.00
[/TD]
[TD="align: right"]2
[/TD]
[TD="align: right"]$4.00
[/TD]
[/TR]
[TR]
[TD]
Thin Jaw Adjustable Wrench
[/TD]
[TD="align: right"]$40.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$40.00
[/TD]
[/TR]
[TR]
[TD]
Lighted Magnafier
[/TD]
[TD="align: right"]$10.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$10.00
[/TD]
[/TR]
[TR]
[TD]
Imperial long hex bit sockets
[/TD]
[TD="align: right"]$23.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$23.00
[/TD]
[/TR]
[TR]
[TD]
Metric long hex bit sockets
[/TD]
[TD="align: right"]$15.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$15.00
[/TD]
[/TR]
[TR]
[TD]
Metric hex key set (incl. 7mm key)
[/TD]
[TD="align: right"]$18.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$18.00
[/TD]
[/TR]
[TR]
[TD]Imperial Hex key set
[/TD]
[TD="align: right"]$0.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]
Ultrasonic cleaner
[/TD]
[TD="align: right"]$84.95
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$84.95
[/TD]
[/TR]
[TR]
[TD]
2nd Stage cap remove
[/TD]
[TD="align: right"]$10.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$10.00
[/TD]
[/TR]
[TR]
[TD]
Guage for dual drive adjusting tool
[/TD]
[TD="align: right"]$25.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$25.00
[/TD]
[/TR]
[TR]
[TD]
DIN Retainer Tool
[/TD]
[TD="align: right"]$29.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$29.00
[/TD]
[/TR]
[TR]
[TD]
HP Restrictor Bullet O'Ring Kit
[/TD]
[TD="align: right"]$8.50
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$8.50
[/TD]
[/TR]
[TR]
[TD]
Orifice/Valve T-Handle
[/TD]
[TD="align: right"]$23.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$23.00
[/TD]
[/TR]
[TR]
[TD]
Schrader Valve Tool (1.65" BIT)
[/TD]
[TD="align: right"]$6.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$6.00
[/TD]
[/TR]
[TR]
[TD]
HOG D1 1st Stage Service Kit
[/TD]
[TD="align: right"]$20.00
[/TD]
[TD="align: right"]2
[/TD]
[TD="align: right"]$40.00
[/TD]
[/TR]
[TR]
[TD]
HOG D1 2nd Stage Service Kit
[/TD]
[TD="align: right"]$15.00
[/TD]
[TD="align: right"]2
[/TD]
[TD="align: right"]$30.00
[/TD]
[/TR]
[TR]
[TD]
HOG D2 2st Stage Service Kit
[/TD]
[TD="align: right"]$20.00
[/TD]
[TD][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]
HOG D1 Soft Face Cover
[/TD]
[TD="align: right"]$8.00
[/TD]
[TD][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]Materials
[/TD]
[TD="align: right"]$737.16
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]W/Class
[/TD]
[TD="align: right"]$737.16
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD]Class
[/TD]
[TD="align: right"]$250.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$250.00
[/TD]
[/TR]
[TR]
[TD]
SDI - Visual Inspection Procedures book
[/TD]
[TD="align: right"]$23.80
[/TD]
[TD="align: right"][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]
OPV Removal Tools
[/TD]
[TD="align: right"]$13.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$13.00
[/TD]
[/TR]
[TR]
[TD]
Pit Guage
[/TD]
[TD="align: right"]$23.31
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$23.31
[/TD]
[/TR]
[TR]
[TD]
Tank plugs
[/TD]
[TD="align: right"]$4.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$4.00
[/TD]
[/TR]
[TR]
[TD]
Tank neck brush
[/TD]
[TD="align: right"]$16.25
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$16.25
[/TD]
[/TR]
[TR]
[TD]
Thermo Valve Service Kit
[/TD]
[TD="align: right"]$16.00
[/TD]
[TD][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]
Viton O-Rings (Individual Asst)
[/TD]
[TD="align: right"]$1.00
[/TD]
[TD][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]
All-in-One Thermo Valve Repair Tool
[/TD]
[TD="align: right"]$50.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$50.00
[/TD]
[/TR]
[TR]
[TD]
Inflator Service Tool (DSS)
[/TD]
[TD="align: right"]$8.50
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$8.50
[/TD]
[/TR]
[TR]
[TD]
Viton O-Rings (Pack of 50)
[/TD]
[TD="align: right"]$25.00
[/TD]
[TD][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]Tumbler
[/TD]
[TD="align: right"]$200.00
[/TD]
[TD][/TD]
[TD="align: right"]$0.00
[/TD]
[/TR]
[TR]
[TD]
Dental 3x Magnafier
[/TD]
[TD="align: right"]$16.00
[/TD]
[TD="align: right"]1
[/TD]
[TD="align: right"]$16.00
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]Materials
[/TD]
[TD="align: right"]$131.06
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]w/Class
[/TD]
[TD="align: right"]$381.06
[/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[TD][/TD]
[/TR]
[TR]
[TD][/TD]
[TD][/TD]
[TD]Total
[/TD]
[TD="align: right"]$1,118.22
[/TD]
[/TR]
[/TABLE]