50,000 times in order to be able to drive a nail. Most little kids can just watch somebody do it for a few seconds, and practice for a few seconds,and they are as "good" at it as garnad or asswipe will EVER be. See, dumbass, I am capable of using PRINICPLES. Once a man like me has seen an A frame pack, making one is nothing. I never saw a can made or mounted in my life, but my first try worked FINE. I'd never seen a brass piloted drill bit, nor a counterbored and tapped gun muzzle, nor a baffle, nor a baffle forming kit. I made them all, and I made them work just great, first try. Some people are just MANY TIMES more capable than other people, that's all.