AJ,

If the squish band is not on the contra, my question is valid. I assume by your and other responses, that the answer is no.

I had no intentions of ruffling feathers, just trying to understand a guy's heat problem.

From looking at the picture of some of your heads, it APPEARS that the contra is smaller than the bore (on some?). I would guess that this provides a finer adjustment than a full bore contra.

Nice work, BTW.

George