Cranky Old Bastard
I'm always surprised when someone talks of changing the offset of the seatpost to adjust the ETT.Zero-offset post might help me run a longer stem on the 57.5 for steering and load, but stills feels like tinkering to make up for frame that's too big.
Isn't it true that you have to adjust the saddle to the right position first, and then play with the stem?
The saddle is set according to your leg and femur length, knee angle, KOPS (if you want to use it) etc. There is only one perfect spot for your saddle and moving your butt forward or back from that ideal spot can create other positioning problems.