Hey all, On my list of things to order from Summit is a piston stop. On of the scariest experiences I ever had a few years back was when I was trying to determine TDC with a piston stop. I could not feel a positive stop with the piston stop and wound up bending. (Hence why I need to get another one ) I was very concerned that I had damaged the piston, but it had turned out ok... I was also worried about valve interference. How deep should one thread the piston stop and ...any other tips on doing this right beyond removing all the spark plugs???