It is common pactice to use the thickest rubber with the compensating spring on 113s. The lower spring plates you refer to only change camber very slight and are usually set for full height anyway.
The right side camber is always more neg than the left due to the axle off-set specs of 36 MM , to the right of centerline from axle pivot point.
I have a simple tool you can make to set the off-set to spec.
If you would like the plan, send an email........