I have a 6" lift on my truck. The front driveshaft angularity is bad enough for it to bind. Now, driving less than about 20 mph it is no a big deal, I can't hear a knocking/clunking sound and I do keep it lubed up pretty well. Over 25 mph and it makes the death-coming-soon sound. Sustained, I'm sure it would spit the driveshaft. I don't have the $$$ for a new one ($160 from Denny's) plus I can't see buying a 1310 driveshaft when I really would eventually like a 1350 one (even more $$$.) So, I have heard about clearancing the CV. I've taken out the driveshaft and and see where it could use some clearancing, but what do I clearance it with? How much is too much? I have a standard electric drill, but where could a get an attachment small enough?