Hey Papa,
A Dremel with a cutoff wheel works really good for this. It leaves a fairly straight edge where diagonal cutters leave a V. Lots less filing...
I chuck them in my vise and carefully hit them with the Dremel. I always buy extra and carry them with me.
I get plugs for about $2 apiece. That's cheap enough that I don't worry about 'minor surgery'!
Points file! plumbers torch! I think I am having a flashback!!!
