I have both springs but my perches are for multi-leaf. If I use the mono-leaf spring and use the appropriate sized spacer I should be able to re-use the stock spring retainer plate. But if I want to use a larger spacer – one that would not allow the retainer plate to fit up against the perch I’m assuming the stock retainer plate is not beefy enough and I should make a thicker one? What have others done? Thanks. -Bob