That's mostly why I've settled on 3 angles for my platform. For me its:
- 40 for NRS (both sides) and my SRG.
- 60 for my bottom bowl gouge
- 75 for the teardrop hollowing scrapers
I don't use skews enough, so they're not in that list (yet). I've done something similar with my varigrind setups (that is, I don't have to change much to go between bowl and spindle gouges).
I have probably made a few compromises in what angles I use, but it makes sharpening much easier.
I am lucky to have 2 grinders (4 CBNs) so I keep the varigrind setup and the 40 on the better of the two. But before I had 2 grinders, I had 3 platforms each set to the angles above. And I kept a sample square of formica to set the distance between the platform and the wheel so the platform would go back to the same place (thus same angle) each time.
And before that, I made some angle gauges. Some of the various jigs I've made for sharpening are here:
https://dlwoodturning.com/tag/sharpening/ - down a ways on that list are the angle gauges and how I lay them out for various angles. Most of my jigs are made to copy a grind rather than to grind a specific angle (that is, I find a grind I like then create a jig to get the sharpening setup back to that point).