Actually I've made plenty of mistakes. In fact I think it's the norm for me! But many people talk of using a limiter to "form the caps" which is where I was coming from. However, I guess I AM lucky, my mistakes haven't resulted in any thing burning up! Usually a fuse blows, something squeals, tubes red plate or it sounds garbly! But it does beg the question: If using a limiter at low voltage protects from failure, then how do you know until you test at full power? "my car doesn't vibrate at 30 mph so my wheels must be balanced fine"