[gothodgie]

I got the 300 watt one this week from http://www.speedwaymotors.com/300-Wa...-Iron,399.html.... I have done my 2 front tires so far and it seemed to work great... I don't have anything to compare it to, but it took me about 30 minutes per tire and didn't take much effort to cut through the rubber... The grooves are about a 1/4" deep....

The only thing bad about for me is that i have arthritis in my hands so it made my hands hurt a little, but wasn't too bad... i took a break between tires...

Here's a pic of 1 of the tires and the leftovers...