just got a set myself and was wondering how a lil time with the tire groover would do for them.i figure i could cut the lugs in the center about 1/2" deep to start with,maybe later cut the lugs into a scoop like i did on my full size tractor tires...
(http://i34.photobucket.com/albums/d132/n2oef/utf-8BSU1HMDEzNzkuanBn.jpg)
(http://i34.photobucket.com/albums/d132/n2oef/utf-8BSU1HMDEzODEuanBn.jpg)