Hi,
I have to admit I am not a huge fan of the belt hook system to hold the stick.
There are multiple reasons, the mains are, too much weight on a single point... The belt. I can't really find the right settings not to have the board to close to my belly (I should loose a bit of weight!) which makes hands difficult to move. And last is the impossibility to play stand up or sitted with same settings.
I then used a NS design Boomerang Strap holder system. To attached it to the Stick, I removed the belt hook and added a piece of wood.
As you can see on pictures, this piece is done such a way that the point where the Boomerang is attached is around 18th fret.
On the strap, I added a string which is attached to the stock's head, to keep the instrument on the desired vertical position.
This piece of wood is still a "prototype", made of parts I had in my basement. I will in close future do it with nice hardwood.
I am really happy, this combination of Boomerang plus the piece added to the stick solve all problems I mentioned.
Hope this will give ideas to the ones who are not fan of the hook.
and I have the same issue - I just can't get the thing away from my stomach, which makes right hand playing impossible. Maybe you could share your design when you get it refined?