Hi Z, The cheshire collimator is a very good choice. I have the orion one but I think the celestron one is identical. It is pretty easy to use. Collimation is not hard and doesn't usually need to be done very often. Check out astrobaby's site on the net. She has an excellent article on collimation that will set you right. Just type in google "astrobaby collimation" and that will get you there. The 1.25 inch tool will be fine with your scope
Cheers, Richard
