[koputai (Jason)]

Well about two years ago I got sick of not being able to use my GSO 12" effectively because it would NEVER stay in
colimation, so I took it apart with the intent of fixing it, but never did. So it got put away in pieces and it's been
there ever since.

Now a few weeks ago a neighbour asked which scope they should buy as they want to have a go at astronomy, so I
took my 8" Dob and a few eyepieces over for them to have a loan of for a while. Unfortunately this has left me with
no easy to use scope, so the 12" has to come back out.

I've put the bloody thing back together and done a colimation (Howie Glatter Laser) and all looked good until I tilted
the scope. I could see the reflected spot back at the eyepiece moving around as the scope tilted!

The spider seemed tight, but any touch would send the spot wandering, so I whacked some washers behind the screws
so I could do the spider up tighter. Better, but not perfect. However, the spot still moves a long way (5 to 10mm) when
the altitude of the tube changes. everything is tight, it seems there is flex in the tube itself.

Can anyone suggest how I might get rid of this flex? It basically makes the scope unusable.

Thanks,
Jason.