Pinblock Drilling Rig

[William Monroe]

I should also add that the platform is just construction grade 3/4" plywood 
with a couple steel T-Braces and 1-1/2" strips of 3/4" ply glued on edge for 
support.  I stepped the supports back on the treble side to allow clearance 
for the platform in the curve of the piano.  Very rigid.

William R. Monroe