Well according to the owner he says it has been well looked after.

Looking at the notes it looks like it has had a few sprag clutches, plus loads of other stuff.

I think his expectattions are on the high side, your estimate of 6K is probably nearer.

No idea about what to look for - never had a commando.

You are right a hydraulic bench would probably be a lot less stressful, and possibly more reliable