yeah, i thought about going the razor blade approach... but considering how cheap it is to have a shop do em, I'd just use the shop. The sipes will be to a relatively uniform and correct depth and if they screw it up I get a new tire... if I screw it up, Im outta luck. /forums/images/graemlins/wink.gif not to mention the time involved, for those that have done it, how long did it take to sipe a 39.5" tire? I have a feeling it gets pretty old after a few dozen cuts...
j