Bought the 6.4 mm shims for the dynafit radical 2.0 st binding and the 23.5 mm torx screws.
The shims were a perfect fit right out the box. The 23.5 mm screws were a nearly a perfect fit and required no modifications. I roughed the surface of the binding, ski, and both sides of the shim, and used slow cure epoxy between the ski, binding, shim, and in the screw holes.
It has held up for two long ski days and the ramp angle is noticably better. I no longer feel like I'm in high heels after stepping into the skis, and it is so much easier to skate uphill. Uphill skinning seems unchanged.
I did counter sink the holes on both sides of the binding with a drill and slightly larger drill bit. Since the radical binding has a slight welt under each screw hole, and the screw holes in the ski were slightly raised as well. It probably wasn't necessary but it made it easier to line everything up while screwing it in.
I highly recommend this shim with the 23.5 mm screws for the radical 2 binding!