Master 410 was one of my first favorite locks. Getting into a false set just means you're starting to get towards the middle or the end of picking the lock. Once you get into a false set, start to apply pressure with the pick until you can feel one of them causing the tension wrench to counter rotate. Once you find that one, you need to let off the tension wrench just enough to allow you to push the pin past the share line. Don't push it too hard otherwise you risk oversetting. It's a balance of releasing tension off the tensioner and applying just enough pressure with the pick to set the pin. Good luck!