I was thinking of upgrading the collimation thumbscrews of my dob too very soon.
http://www.bobsknobs.com/Newt/page66/SWdob.html
The default ones are pretty bad and can even come off while trying to collimate...
Apparently their dealer in OZ is Bintel but Bintel doesn't have them on their website? I could order them from the US of course, but as I intend to go to Sydney and visit Bintel soon I thought it would be better...
Anyway, is it difficult to change all the screws? It should be pretty straightforward I hope.