Take the custom made square aluminum base with four 1/4-20 holes, screw in an SM1 ring, then add a viton o-ring and mirror face down. With the custom made top, which looks like two concentric cylinders with a slot, add 3 #4 nylon tipped set screws. Add a tested piezo (see the previous piezo testing posts) with the wires through the slot. Center the piezo by gently tightening the set screws. Take the piezo base and back off the mirror so that it is under the top face. Add the top with the piezo to the base, and insert and fully tighten the 1/4-20 screws. Hold the assembly upright gently screw in the sm1 ring until you feel some resistance due to the piezo interfacing with the mirror. Then back off the set screws that hold the piezo.

<I will add photos the next time I do this procedure>