[Ripped]

1st day I used it, fairly pleased with the results.
In working the inside of the mustang 1/4 panel scallop, the shrinking tightened up the metal, which seemed to ramp the scallop back towards the outside of the car instead of the inside.

I'll have to learn to be aware of how the shrinking will affect the panel.

So far I like it though. Should save a lot of filler work.

[Bee4Me]

I've been playing with mine as well.
Got to get another grinder though, I have a 3400 RPM and it just does not build enough heat and I borrowed my neighbors Makita which is a 10K and it's WAY too fast. John recommends a 5K which I'll get.
I have an import hood I got from a body shop friend I use to practice on and it's fairly thin metal and made some practice dents to work on before I hit the real thing.
Nice tool for sure.

[Ripped]

My first try, the disc undid itself when I switched off, with the disc spinnig wildly through the garage. The second time, I used a good backing plate, and a different nut.

Funny, after that, I would have opted for a slower machine!

[Bee4Me]

Hahahaha...
Yeah, It's deffinetly different securing the disk down compaired to sandpaper.
It takes "some" tightening down of the nut with the rubber backing pad to get it snug,so put the hurt on it next time.
The Makita has a shorter shaft spindle and it took some effort to get it to even lock up.