There appear to be a couple of minor bugs in the 18wattagblank.jpg
I compared the drawing with Ian´s amp and found:
upper tag row:
- ok
middle tags:
- two tags on the left side go to the right by 3 positions
- single tag on the right side goes left by 1 position
lower tag row:
- mounting bolt on the right side goes left by 1 position (swap position with tag!)
Btw,
- tagboard dimensions: 10 1/8" x 2 5/8"
- tag spacing 3/8"
- tags start 3/16" from board edge
Adrian