...BTW your Bieber avatar is awesome.-Malone
I think it's OK to tighten the cam bolt with the locker in place. Some people think this can still break the rear out of the cam and probably can if you torque it too hard, I've never had it break on me when torqueing the cam bolt. If you are real worried; you could just snug it down and see how everything is aligned after spinning the crank a couple times, then find a better way to hold it for the final torque. Takes alot more to break the bolt loose than it does to torque it down when done. I wouldn't depend on the cam holder in it's slot to hold the cam while I break the cam bolt loose. Saw it posted once that the 10mm/13mm open end wrench in the spare tire tool kit, holds the cam real well,.. I tried it and it does a good job,.. I don't know who to give credit for this idea.