I had the same experience with the thin wrenches, although the combo 9/16 and 11/16 is nice to have on hand for hose removal.
Tools that you will constantly be working with (other than hose wrenches and a hex key for port plugs) are some wooden dowels that Robert will send you and a couple of brass picks and a plastic pick.
The next most used tools are the vise and vise holders which are simply bars with the ends threaded to fit the HP and LP ports. You screw one of these into the reg port and then you can clamp the tool instead of the reg body. For some operations they let you apply enough leverage that you can skip the vise entirely. Robert ordered a bunch of these for those of us that needed them. When they didn't arrive in time he bought some appropriate sized large bolts, cleaned up the threads and sent them out instead.
After that it's a smallish number of specialty tools that are mostly used for a single operation. Here's a photo of all the tools I used:
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The luggage scale was in lieu of a torque ratchet. The three spanners at the top and the white bottle-shaped thing at the right are Mares tools which I got from
Aqua Sport Online . Mares won't allow their North American dealers to sell their tools or parts directly, but they are no longer dealers.
@Charlene Barker was nice enough to go through her workshop, gather up the Mares tools that were left behind and sell them to me at a reasonable price along with a bunch of Proton service kits. The middle-sized one is for removing the yoke nut, the cutout allows the jaws to reach past the yoke. It also perfectly fit the Scubapro yoke nut, so I didn't have to buy the special driver and ratchet extension for that from Scubatools.
Speaking of Scubatools. You can see their hook spanner and inline adjustment tool on the right. Right below the hook spanner is a 5.5mm hex driver for the nut that holds the lever on Mares and many other European second stages. They also supplied the blue handled double twist o-ring pick on the left and the face spanner which is next to it.
I already had the hex keys and wrenches except the wavy one at bottom center is from Robert. He also supplied the o-ring bullet and the hemostat. He gets used hemostats for free from his side job as an anesthesiologist. (Just to be clear, that's a joke. He actually grabs new ones from the supply cabinet when no one is looking.) I had to buy the $35 circlip pliers from Home Depot at the last minute to remove precisely one clip. The red-handled side cutters next to them were only used to cut off the zip ties on the second stage mouthpieces.
I'm quite proud of the socket on the ratchet at center right. This is for the very thin turret bolt on the Mk 5. The head of the bolt is so thin that it doesn't extend past the chamfers on the end of a socket which means you can't get a grip on it. I bought a cheap thin wall socket of the correct size, stuck it in the vise and hand filed it until the chamfers just disappeared.
These are the tools for my regs. Everyone will obviously have a slightly different set. Also I think there might be a tool or two used for servicing LPI quick connects that is missing from the picture. I decided to skip that part so I could continue working to get my well-stuck diaphragm reg apart.
I just realized there is one tool missing from the picture. There's a couple of operations that require low pressure compressed air. By low pressure, I mean something like 40psi, not the 135psi that comes out of your low pressure ports. If you don't have a compressor, one workaround is a little tool you can hook up to your low pressure inflator. It has a rubber tip that you can bend to release air, the amount you bend it determines the air pressure. I got mine off Amazon, but I'll link to the page on Piranha because they carry it for all three LPI connectors. They call it a BC Air Nozzle. There is also a version with a tire inflator end at the bottom of the page:
Tire & Air Inflators Piranha Dive Shop |