I hope I don't go off topic here (sorry if I do)
Come to think of it, the meg counterlung are one of the downsides of the megalodon rebreather IMHO. They are tough and well made, but they are also very bulky, non streamlined and big. Especially for me who is only 175cm tall and 63kg.
I had mine stitched smaller by sewing the bottom inseam together on one side on each CL. They now fit my tidal volume better, but they are still WAY to big.
Nice to get that of my chest
Safe diving
/Christian