I have done several. If you enjoy the pleasure of working on your own gun, it's fine. If you look at it like it's real work, and a pain in the a$$, then paying a gunsmith to do a top notch job is a bargain. It's the same with reloading. Some of my buds hate reloading. I, on the other hand, find it one of the most rewarding things I have ever done. Gonna start on my bud's 338 Lapua Wednesday. Making a rifle that shots like a shotgun turn into a one holer is a lot of fun to me. Thank God it has a muzzle break!!!!
Use blue masking tape on the stock. Mount the pad. Out line it. Mark the bottom of the stock contour. Start with a belt sander. then a palm sander. Use a fan to blow the rubber shavings away. Safety glasses, ear plugs, and respirator protection. Use a type of light that will see very good without shadows[spot light].
Hope this helps.