Well Scottrik, the reamer still lives and keeps cutting holes in lexan as good as it did before, I can take a picture of the reamer I did it with if you want but aluminum is a pretty soft material once you get through the anodising.

For the people who can do this at home perhaps its smart to use, I dont know, a countersink drill.... maybe just a sharp SS10 drill or something. Then you wont even risk the reamer.

And whats that about precision??? do you acuse CRC of making a part thats not straight? or how does me cutting a 45° angle over about half the inside of the CRC part make it a bad part?
Trust me, I have had the slapmaster bearing as well and I use this now because I dont trust the delrin piece thats accompanied by it. It centered on the shield of the ball bearing and it also applied its pressure there. The CRC thing does not, it centeres on the axle and puts pressure on the outside of the ball bearing.