I am trying to set up my SV 9mm mags with bolen products. It seems like the mags need some trimming in order for the pads to fit? Should I file it or should I modify the pads instead? Also, it seems like the springs are a bit longer, should I also cut the springs? and lastly, the follower seems longer, it seems like I also have to trim it. Need help and anybody's input on this. Thanks in advance.