I've built a lot of things over the thirty plus years I've made my own equipment. I've only made up plans for a few of these items. if there is anything else you would like to build, please ask. I just might be able to help and it might be worth drawing up the plans for them. It's fun helping other divers build their own equipment.
Right now, I'm working on a DPV (diver propulsion vehicle). The plans may be available when I'm done building it.