Make an option in the Feature Hole command to measure from 3D walls on the model for Direct modeling mode. And in Parametric modeling mode it would automaticly create a sketch to reference.
I hate holes : ) Also, it would be nice to have the SHCS sizes pre-loaded in the hole command. Or, just an option that when you select it, it solve the proportions like:
"Select" - SHCS - or - Counter Sink - Metric - english -
3/8 hole
Then it would solve
1. Counter Bore depth 105% of thr Hole Ø
2. Counter Bore Ø = 150% hole Ø
Then, there is no need to go through a big list.