[Zuts]

Hi,

I have an edge HD 9.25 and had the same issue. I was thinking of getting a hyperstar so attempted to take out the secondary in the normal manner by twisting the large black locking nut.

Horror, the entire secondary assembly just rotated with the locking nut.

I took it to bintel and and they said this shouldn't happen and that basically the secondary assembly was loose. To fix it they removed the corrector so they could tighten the secondary assembly.

Edge HD's are made in the US and all have a mark indicating the correct orientation of the corrector, also they don't use shims anymore. Taking off the corrector tightening the secondary assembly and re-assembling took around 3 minutes courtesy of Don at Bintel, at no charge I should add, and I didn't buy the scope at Bintel.

I had to re-collimate the secondary and now everything is fine.

I can easily remove the secondary mirror now as the secondary assembly is now tight. Putting back the secondary mirror is simple as the Edge HD secondary has a pin and the mirror can only go in in one orientation.

However I am not sure if all the above applies to a regular C9.25.

Cheers
Paul