I worked out a cheap & easy way to dimple Nutplates today without buying or grinding down the edge of dimples. Simply take a piece of 1/4 steel about for inches square, drill a #40 hole close to the edge (so the countersink for the screw clears the edge) then machine countersink the hole so an AN426AD3 rivet sits just below the surface. Now simply use plate as female side of die. I used mine the the bottom on the DRT2 and it worked great, also I straightened the Nutplate out due to distortion of the dies by leaving the weight down on the handle and slightly stretching them down.