Its a nice looking knife but think your right, the sheath looks awkward and the open end of the handle would do my head in! Think a new design is in order... mmmmmm wheres my drill.
At the moment I use this knife#
https://www.apnea.co.uk/product_info...roducts_id=558
Hope that works, if im picky its a little big but they do a shorter version. Love the release mech. from the sheath though, currently on my belt but planning on glueing the sheath covered with neoprene to my suit.
Joe