It's a matter of angle, not a matter of Hight.
I'm not that idiot!
I maybe didn't explain well.
what I need for a correct left wrist position is fingerbord surface parallel to my body,
like when you play sit. if the fingerbord is facing up when you strap it on it will be harder to play and can take to wrist healt problems
because you'll have to bend your left wrist much more to reach the lower strings
It really makes a lot of difference to me, that's why I'd like to know Ken's opinion about that
I hope I sayd that clear now. (i'm sorry for my bad english)