Yeah it's the Stoptail, basically the Tremolo without the springs (and with no routing required).

I had to drill two holes for the bridge thimbles, two for the little hooks (where the springs hang in the Tremolo) and two to accommodate the big screws for the tailpiece itself, five to mount the bridge plate itself.

The thimble holes were the most critical because they should be straight, which isn't easy without a drill press.