Stephen Paul wrote:
Well, now I've done it. I put too many ventillation holes in the mirror cell
end of my Starfinder Dob, and the star test now shows a poorly supported
mirror. Not to worry though, I'll fix it.

I find it hard to believe that a weak tube could deform that thick Meade
particle board cell, but I suppose it could happen. I know these are
obvious questions, but it doesnt hurt to ask: Did you let the mirror
stabilize before the star test? Have you removed the mirror from the
cell lately? It's good practice to remove and reglue the mirror every so
often because the wood will eventually warp, pinching the mirror. I had
this problem twice with my old starfinder 10" dob. Dont forget to use
stacks of dimes or something else to create a sufficient air gap when
gluing the mirror to the cell.

-tom