Thanks for the info, however I think I may hold off on this project as a new problem has arisen: Today I showed the 469 to my grandfather and he wants it, so of course I'm going to let him have it. This being the case, I'll grab a set of standard plastic replacement grips off eBay, and grab a couple extra mags for him. Really, I think the original grips will hold up just fine as is, and he probably won't shoot it much if at all anyway...