18 years ago
I ordered one from J&L, but the Armstrong 89-441
the right width for my .56" slot, but is too short for the 3"
diameter dish it sits in.
So I made one yesterday with a radius of ~ 2.85" and a height of ~ .75".
I hack sawed out a 3" x 1.5" x 1" piece of steel from a length of
Then I drilled holes in it, mounted it on a rotary table on the vertical
mill and cut the radius.
It works, but now I realize, the dish is sits in is spherical.
I can't even imagine how I could have done it right.