If you aren't mechanically inclined let a good gunsmith do it, you'll be pretty bummed out if you tap the hole for the oversize bushings at an angle. Request that loctite 2760 be used when he screws the cleaned oversize bushings into the cleaned and oversize tapped holes, before staking. I've only had one bushing come out, that on a new Kimber when I changed the grips. I cleaned all the holes and bushings and loctited them in place. You will need heat to overcome the loctite and remove them even without staking them. Just be careful to not get any into the inner threads, and wait a day before putting the grips on to make sure the screws don't get loctited in!