Baby Doubles for Double Hose Reg

[rx7diver]

I am now one step closer to completing the baby doubles (for my double hose reg) that I've posted about in several threads: I ordered (from Grainger dot com) and earlier today received the "Binding Posts" that thread onto the carriage bolts that pass through the tank bands.

I drilled larger the holes in my back plate, but I still need to cut down the carriage bolts (a bit too long). This is where things stand do far:

ETA: I posted about the harness (Post #5) here: Twin 45's back from Hydro and valves/manifold rebuilt.

ETA: And I posted about the manifold (Post #43) and the bands (Post #47) here: Twin Set Considerations/ Manifold.

rx7diver

 

[James79]

That looks sweet!

 

[rx7diver]

That looks sweet!

Thanks. I'm following the lead of several ScubaBoard members who have already done this. Next, I need to source some appropriate wings!

rx7diver

 

[rx7diver]

Yesterday, I finally got around to trimming the carriage bolts. I used my Dremel.

Only things left are the BC and the pull rod. And the inaugural dive.

rx7diver

 

[Compressor]

Nice Setup @rx7diver. Thanks for sharing the photos.

 

[Scuba Lawyer]

Very Cool setup!

Here are my Twin HP 40's. Haven't used them in a while and they need some clean-up but lots of fun.

 

[rx7diver]

Yesterday, I finally got around to ...
View attachment 669330

UPDATE: I was able to take my rig for its inaugural dive in a local swimming pool earlier today. No BC. No pull rod. Began at ~1,200 psig. Ended with ~200 psig. I wore my swim suit and tee shirt, and mask, fins, and snorkel, only.

Some observations:

1. The rig wore surprisingly well--even when portaging it from the parking garage, across the street, down a tall flight of stairs, into and then through the recreation facility, down another tall flight of stairs, and, finally, down and around a long hallway to poolside! In the water, the DH can was correctly positioned, and the rig dove quite comfortable, with regulator recovery accomplished without issue, and I'm sure my underwater doff and don will go quicker and more smoothly next time.

2. I absolutely need the pull rod; I couldn't reach the J-valve (since the tanks were so low, as intended).

3. In fresh water, I will need to wear this rig with an exposure suit. I was a bit heavy (negative) fully submerged, when the old U.S. Divers SPG read ~1,200 psig, and remained a tiny bit heavy fully submerged, at 200 psig. I think my O'Neill 3/2 will be enough. Maybe. (I had it with me, but decided I didn't want to put it in a chlorinated university swimming pool after all.)

4. The increased mass (compared to my single OMS/Faber LP 66) is quite noticeable, especially when quickly "leaning/rotating" from side to side and yawing--the way a photographer/videographer or hunter might. I didn't dive the rig long enough to detect whether I could sense what is almost certainly more drag (due to the greater cross sectional area: 2 x 11.9 sq in, vs. 18.7 sq in for the OMS 66).

VERDICT (so far): Very pleased so far. And even though the length of the OMS LP 46's seems perfect for this application, I think Faber LP 50's can be used here, too. (They won't be too long, I think.)

rx7diver

 

[rx7diver]

Here's a pic of me and the kit arriving poolside.

rx7diver

 

[Jcp2]

Here's a pic of me and the kit arriving poolside.

rx7diver

View attachment 670940

They look like the Rocketeer backpack.

 

[rx7diver]

They look like the Rocketeer backpack.

@Jcp2,

I had to google "Rocketeer." And then I spent way too long watching Rocketeer YouTube videos!

rx7diver