Sorry, I'm not in agreement with your premise that balancing between the two wheels is how best to fit yourself on a bike. For bicycle fit the centre of the bottom bracket (BB) is the balance point and the zero, zero reference point for all measurements.
This is a fixed reference point. The centre of the two wheels is all over the place and subject to numerous variables that have nothing to do with how the rider fits on a bike.
I have heard of frame builders taking the weight distribution on each wheel into consideration in a frame design yet the is secondary rather than of primary importance to fit.