Nice article Cedric, thanks!
I use my YBOD for cave diving here in Finland. We don`t have any natural caves but only man made holes
I have a BOV fitted with Swagelok QC6 connectors ro a stage. I use the breather because I like to have good gas all the time and don`t like the noice of OC gear. Mostly my cave dives are around 30-60m. We have some deeper tunnels also that we are starting to dive. The problem here is that the water is so cold all the time, it is +4 Celsius when you go deeper than 15m
JH
Finland