All divers need a 3d printer
Dive manufacturers seem to have a relentless enthusiasm for making things hard to take apart to service. I assume this is so you'll pay the money to become a proper service tech and to protect the income of those that already are. For regulators and tanks I'm largely on-board. Give me someone who knows what they're doing and I'm happy to pay, but for so many other things that just need removing, replacing or tightening the lack of tools can be a major pain in the backside.
Today for instance, I have 1 very rubbish dry suit that a student is using for pool training. It has a SI-TECH deflator (dump) valve that is totally stuck, not working, generally buggered. Given the state of the suit, I'm really not looking to replace it with a new part but I have enough bits and pieces lying around in the dive workshop I'm sure I can make something work. First challenge - getting the dump valve off. Teeny tiny little plastic notches appear to be the method... trying to use a metal tool runs the risk of A. totally messing up the teeny bits of plastic and B. Flying off and imbedding itself in my hand. So the solution - 3d print a SI-TECH removal tool from Thingiverse. Once printed, it fits on the teeny tiny plastic bits and removes the valve.
Next challenge finding something suitable to fit. Thought I had an apeks dump valve but can't find it - never mind - I have an old Northern Diver suit with a dump valve on, lets take that off and attach it to the other suit. Look at the ND valve - razor sharp pieces of plastic, this leaves a chance to cut my finger off, break the valve with a metal tool, the usual chance of the tool flying off and braining me... or 3d print a Northern diver valve removal tool - now in progress.
If only I could print something to find all the leaks in the suit!