Jonathan, If you are going to upgrade your focuser, a 2" is your likely your best option. There are many 1.25"/2" adapters available. This does mean you have to bore a bigger hole, though.
Boring a larger hole in my tube sounds a bit scary. I guess a dremel with a grinding stone might be a good way to go for that though? What type of telescope are we talking about? Good stable focusers can be
as cheap as $40 (a helical) or over $500 for fancy crayford's with anodized colors.
It's an Orion 6LT. Ya, i've seen the fancy moonlight crayfords, my 150mm isn't worthy of one of those. :D I know the less expensive GSO or Zummell alternatives are fairly cheap but I would really like to spend even less than what those are going for new. Hopefully someone here has something around that range? :D
My focuser had some slipping issues and adding a motorized focus solved them. The alternative was more expensive because the tailpiece and focuser are one.
Erik
The focuser doesn't slip, it rocks back and forth. It made collimation a PITA. If i tighten the set screw, it doesn't.... but that's pretty obvious why. :P Ha ha.