I have a savage 10FXP 308 with a top bolt release that I would like to put in a 11 Lightweight hunter wood stock that is designed for a bottom bolt release. I have the bottom bolt release trigger guard already but savage told me the bottom bolt release sear is a gunsmith only part. And even If i could get ahold of one I have read the the way the spring attached to the trigger group/receiver is two different between the two models. I would much prefer to not have to cut into my new stock if i don't have too.