I'll see if I can find the original cone tweet from the C800, from before I swapped the Medalist II mid, L-pads and crossover parts in. I might have tossed that stuff out when I moved.
While you have that dial glass out, replace the light gaskets at the sides, if you didn't do it already. Trim some self-adhesive foam weatherstripping from an auto parts store down, or buy some closed-cell craft foam at Hobby Lobby and attach it with contact cement. Yours has a lot less light leakage than most dials I've seen. Usually the original gaskets dry out and shrink horribly.
While you have that dial glass out, replace the light gaskets at the sides, if you didn't do it already. Trim some self-adhesive foam weatherstripping from an auto parts store down, or buy some closed-cell craft foam at Hobby Lobby and attach it with contact cement. Yours has a lot less light leakage than most dials I've seen. Usually the original gaskets dry out and shrink horribly.