I am working on scoping my National Match m1a. I have received a mount that I believe will work, and I have stolen the Mueller scope of my Savage .223. The problem I am now running into is that I will have to drill holes in the stock to add the cheek riser but i would like to use. I was able to mount the bipod using the vent hole in the end of the stock so I have not yet had to modify the stock. I realized by drilling holes in the stock that I would need to plug them if I were to use the rifle in any type of organized competition. But other than that what do guys think of the style of cheek riser in the photo. Are they good do they hold up and stay adjusted or should I buy a bag type. The scope is almost low enough that I would not need a cheek riser except I am on the lower portion of my jaw and do not think that will be a good repeatable position. Just wondering about opinions and what some of you other guys have done thanks.