Well I ain't never thought of that, color me stupid I was always afraid I'd rip the stem in half and without the proper tool I'd never get it right so I bought a Valve stem mounting tool aka Valve stem puller aka valve stem installer/remover
They cost $10+ each.
I can tell you thou, it does a flawless job every time.
But you know even if I lost a stem or two you guys have pointed out that it would still be cheaper than running home.
Guess I'll stick a couple in the truck and try the vise grips...
Here's the tool: