Installing Kelsey Hayes Caliper Pistons ?

When air didn't work, I would get a piece of wood like a 2x6, lay it on the ground, take the caliper with the piston(s) facing down( the way they come out) and slam the caliper on the wood. It will take several times and some force, but I have yet to see it not work. Now let all the haters chime in on how you will ruin the caliper. Not true.