The handle or the lever? I guess you meant the lever, right?
Well, I guess the angle the lever makes compared to the horizontal is crucial here, in order:
to kind of “kiss” as well as possible the opposite hand’s natural thumb position without requiring it to be bent or excessively extended while braking
to not get in the way of the same side’s hand.
That’s probably a little “try and fine-tune” loop process - but it really did not take me too long before I could find the ideal angle, corresponding to my own needs of course.
I really encourage those of you who have never tried this setup to give it a chance, as I found it to give more accuracy than “the normal way”.
And on top of it, the 4 other fingers can freely continue holding the handle, even when the thumb is used for the braking, i.e. they are not impacted by the action of braking, which I believe is a cool advantage in that it helps smoothing further the “riding experience”.
Of course I do NOT use this setup for Muni - only with my 36er for road riding, commuting to work, etc.
so basically you have it leant in enough that you can get your wrist directly above the bars to take your weight, but you can easily hook the lever with your thumb when needs be? I might well give it a try. When i brake with the lever in the down pisition I leave my first finger and thumb around the bars and use the other three fingers to pull the lever, meaning my overall hand position doesn’t change.