I run a machine shop.
The first step is to dissassemble the base, and remove it from the other parts. Then carefuly cover the edges in blue painters tape to prevent scuffing damage.
Hold the mount in place, and mark one hole. Then centerpunch that hole, and drill it. Now use one mounting bolt, and secure the base lightly. You can swing it on this bolt to get the pivot of the arm the exact distance from platter center.
When its right, mark the othe two holes through the base. Remove the base, and punch and drill the remeining 2 holes. Deburr the holes with a countersink.
Depending on the arm you use, you may need a larger fourth hole in the center for the phono leads.
John C.
The first step is to dissassemble the base, and remove it from the other parts. Then carefuly cover the edges in blue painters tape to prevent scuffing damage.
Hold the mount in place, and mark one hole. Then centerpunch that hole, and drill it. Now use one mounting bolt, and secure the base lightly. You can swing it on this bolt to get the pivot of the arm the exact distance from platter center.
When its right, mark the othe two holes through the base. Remove the base, and punch and drill the remeining 2 holes. Deburr the holes with a countersink.
Depending on the arm you use, you may need a larger fourth hole in the center for the phono leads.
John C.