Probly wouldn't be a bad thing to just have in a toolbox though. Expensive if it was just for the one fix...but not really as a tool. I'll hafta go look and see if they have something like this at Fry's. It would be a decent idea if I wanna sorta lightly "build up" a couple millimeters above the break. I trust the focus voltage on a 4.5" set must be VERY low current. I do know it's high enough to bite me pretty good though (don't ask)
I gotta get me a high voltage probe someday. My finger makes a pretty good DIGITAL (hehe!) reading though