OceanOpportunity

I use a Neptune on and off. It works great for OC diving, with or without a reg in the octo port. It does not convert for CCR use...at least not with a simply disassembly or with any factory produced kits.

I have also dived the Scubapro mask...like it alot..has a large skirt which is great for over a dryhood, but doesnt fit well with thin faces. This does easily work with a CCR, as you simply fit the DSV through the mouthpiece opening.

as for training...never been 'trained' on a ffm..been diving hardhat and ffm's work work for years. just time in the water and having a well rehearsed bailout plan in mind should $#!T his the fan. Normally speaking, these are a safer bet than a seperate reg and mask