Hi,
Are we talking for developing purposes or deployment?
When I had different versions installed I created symlinks on my system.
I renamed installed iOS folder to iOS-10.2.5.
Then I installed quartz and renamed it to iOS-100.0.0
After that, I created/updated symlink for what version I needed at that point.
For example, if I needed Quartz, my iOS folder was a symlink to iOS-100.0.0
Hope this helps,
David