I'm backing RobSmith on this one. I'm old school, but more like WelfareStyles on the modifications.
You see, as much fun as tweaking the boomstick can be, there will come a point in your life when you have to liquidate that project. Needless to say, the more money you sink in to the project, the less likely you are to recover that money.
After 20 years of raising 2 kids, I'm BACK to where I started with the boys.... and that is owning very few boomsticks. They were in diapers when I could only buy ONE M14 (for $ 400, Israeli Surplus, TRW all matching

) and tweak, then compete, then sell, then repeat the cycle all over again.
Now that both guys are in College/University, I'm restricted once again (been there, done that again, and again) to one or 2 rifles to do all my shooting tasks.
So that's why I'm preaching to go cheap on the M14 stuff! Yeah, they are a shztload of fun to work on and shoot, but not fun to spend hard earned after-tax dollars on...
There! My 2 cents worth!