shock rebound
Add shr shim changes
For this to work, the stacks types need to be the same.
You need to know the 2nd rec_id to compare against.
stack1 = stack for this rec_id
stack2 = stack to compare against
shock rebound
rec_id for stack 1
1
enter rec_id for stack 2
[current compare against]
choose the stiffest stack and to enter rec_ids so percent difference is above 100%