MTB Shim: Tightening cleat distorts plastic plate underneath

MTB Shim: Tightening cleat distorts plastic plate underneath

Q.  I had to tighten the cleat bolts considerably before they would stop slipping. The hard plastic piece that comes in contact with spd cleat was then bent. A. There are 3 long fins on the cleat plate which match 3 slots in the main body. The fins should fit snugly...