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There are a lot of options, all using the usual 1-2kg weights that normally go on weight belts and are universally available 1. Put trim weight pockets on tank cam bands 2. Slide weights onto BPW belt strap, ie thread harness webbing through weight 3. Fasten weights to backplate holes with zip...

Another question: have you dived your 7mm in Germany/Austria already? I live in Munich and theres no way Id use a wetsuit in the lakes around here, especially outside summer. Drysuit all the way ... but different people perceive temperature differently so you may very well be ok. All Im saying...

I dont know the scubapro wing, but most 40lbs wings are too large for a single tank. Dont get me wrong, you can dive with it and probably be safe, but a too large wing has three problems: - excessive drag in the water, meaning its less efficient - can be harder to vent gas, harder to manage air...

Yep, trim is a good example of what even experienced divers can struggle with. In my fundies class, we had four students: - An experienced divemaster/assistant instructor who used to guide liveaboards with ~600 dives - An experienced advanced open water diver with ~150-200 dives - Myself with...

Its a very common site in Mexico or other warmer water places like eg Egypt

Interesting... why did you go for #36? Most people I know that are replacing line, go from #24 to #18, to have the same length (or more), but have the reel less packed. Leaving a bit of space to the edge makes it easier to reel it back in without having to be ultra careful to balance sides and...

Maybe helpful to add what works (rather than only point out whats wrong with the OMS). Id wager that in cave land the most recommended type is the simple goodman handle reel, like the Halcyon Pathfinder or Lightmonkey Reel. The lightmonkey is a bit lighter (delrin handle vs Aluminum handle), but...

In Mexico you sometimes need this kind of length (120mt/400ft), especially if you dont exactly know where to find the mainline ;-) or if you stick to C1 limits but still want to see another tunnel (aka run reel to first jump kind of deal). I agree with the above, for cave this reel is...

Exactly that, which brings two challenges: 1. You make your life harder than necessary, because the more air in your wing the more difficult it is to manage buoyancy 2. You may not have enough lift to support yourself and a buddy, in case buddy loses buoyancy

Well they eschew steels when paired with wetsuits (this boils down to the balanced rig point above). With a drysuit you want steels for backgas, Alu for stages

I think thats very hard to say, with the limited info you have given. Having some more info about a known configuration that has you properly weighted (tank, plate, weights, suit, fins, regs, ...) would allow some degree of extrapolation, but even then it would be hard. But some food for...

Also remember that you dont need to fill the bag completely, the gas will expand as the SMB ascends.

One more thought: all the replies above assume you are using a closed, oral inflate SMB (which is what I would recommend). In case you use an open bottom SMB that is filled by purging the octopus into it, then of course you will become more positively buoyant during the process. I am no expert...

I do it this way too, except that outside tech classes I already have the spool/SMB pre-assembled. If you only need one breath, then basically there is no change in buoyancy. In the worst case you’ll be a tiny bit negative if you do a full exhale and are slow to get back on the reg. This ...

The standards probably contain 95% of whats important. Two more pieces of interest: An old quest article with info on the process https://www.gue.com/files/Becoming-a-GUE-Instructor.pdf The fitness requirements to become instructor...