If you tighten the lock bolts carefully but firmly enough the collimation shouldn't need adjusting very often.
I find the best tool is a Cheshire eyepiece.
http://www.ebay.com.au/itm/142458779558
You can make a basic one yourself out of a 35mm film canister. Drill a very small hole in the exact centre of the cap (there is a dimple there that makes it easy) and cut the bottom of the canister, these are a good fit to an 1.25" eyepiece holder.