I been thinking of cutting mine for a while....I saw this tool on TV a couple times and wondered how it'd work. (
http://www.craftsman.com/craftsman-2.0-amp-compact-a-c-multi-tool/p-00923465000P ) I went to Sears and picked one up the other day to give it a shot. I have to say.....I was surprised at how well it worked. The motor on this thing is a beast for it's size. The main thing is not getting it bound up against the other lugs so the blade can move at speed. With the thin, narrow blade, it's not hard to keep it going.
The tool is light and comfortable to use. Fits my hand pretty well.....
The blades are cheap at $4-$5 for a pack of 2....
Initially, I wanted the blade to be a little longer. I think it might hurt the maneuverability though...Once you get to this point, you can lift the lug with your free hand and shear it off.....
The way this thing is set up, you can lay the blade flat on the tire and follow the contour of the tire pretty well all the way through the lug.
Here's what I ended up with.....
Once you figure out your angles (how to hold the tool for best cutting) it goes pretty fast for what it is. I have a good bit of time in this tire, figuring out cutting angles mostly. I'd guesstimate now that I know what works and what don't, I could do a tire in about an hour and a half to two hours. So...for 1/4 the price of a nice groover....I can live with that.
Oh yea....I'm still using my FIRST blade!