I've got a new g20sf that I've been having a great time with. I'm on pace to put about 7-8 thou. Rounds through it this year. How often should I be changing my striker spring? I'm also thinking of getting fresh mag springs once a year. Are the stock 15rnd mag springs 10 coil? Should I up grade to the glock 11 coil. I shoot a lot of 200gr bullets. I tried the wolf +10% mag spring but it would bunch up and stick in the mag.