You can forget about swapping around shims and getting the results you want. It just won't happen.
Just do one head at a time----get the old shims down to where they need to be---you don't want to be turning the motor with one head apart.
KTM EXC 450 2006
Husqvarna TR650 Terra 2013
KTM 690 Enduro 2014
If your bike weighs more than 400lbs. You might not make it.