I use a system and when shots fall outside that system, I'm forced to use feel, often with bad results. Some of the best kickers I know use feel, but I notice they also tend to kick at one speed only (hard). My system is designed for low to medium speed but it's easily adjusted.
I have a somewhat weak 2 rail system, but 3 rails is surprisingly easy, when it applies.
I have a somewhat weak 2 rail system, but 3 rails is surprisingly easy, when it applies.