[E_ri_k (Erik)]

Hey guys. Again I have another question about collimating my 10" Newtonian....

I am using a Glatter laser and TuBlug which are working great.

I notice that when the scope moves, the collimation shifts, usually quite a bit. You can hear the primary mirror shift around sometimes and "clunk", when moving from on part of the sky to another.

Is this normal? Should I tighten things up a little. Obviously there has to be a small clearance between the mirror and the clips, but I'm not really confident to remove the mirror from the OTA to check, in case I stuff something up...

Thanks.