Can't Miss Center Punch

[Crusty]

I bought a 12# sledge hammer for this project and I have to say that it's too big for this old codger to swing many times.

So, size doesn't matter as much as the effort put into it (where have I heard that before?).

Beeman, if you want to do something unpredictable and fun, cut the ends off the installed valves off with a torch and see what happens. Most of mine fizzled but a couple launched nicely.

If your hand/eye coordination isn't anything to write home about you can use exhaust valves since they're a lot bigger in diameter.