I would remove one of the 20.1 for the leaf spring in the midvalve and maybe even the 18.1. Small changes in the midvalve will have a large effect on the feel. Fill in the space of any removed shims with 10 next to the other 10's. Look at the pic with the sherco settings that I posted on the last page, only 2 20.1 for the leaf and no 18. More @Wikipedia
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