I'm interested in this idea as I start to get numbness in the hands after about a couple of hours riding. On a long ride last summer it developed into full ulna nerve palsy and one finger didn't fully recover for about a month.
I'll have a play around with moving the saddle but would moving it back put more pressure on the hands as you become more horizontal?
I moved my seat back to place my knee cap inline with the pedal spindle after reading about basic bike fit somewhere on this forum.
If i understood it correct, it places the rear end further back so the weight is less on the hands, my balance seemed better to after.
If i was you i'd mark my existing seat position with a pencil so you put it back with ease if it doesn't feel right.