We ordered a tire groover. It’s a giant soldering iron with a razorblade ‘U’ at the tip. It heats up to a bajillion degrees and makes quick work of cutting tread blocks. Yes – It smells exactly like that… Awesome + Cancer. We freshened a set of Silverstones and got whatever was left on our Hankooks. If you want to get another couple of runs out of $1000 worth of tires, spend $60 on a groover and start cutting. Most of my cuts just cleaned out the lower bars between the blocks. I did, however, cut one set of ‘hockey sticks’ to make two smaller sharp blocks. New tires will be ordered for Prescott.