FYI, stock carbides worn out on the sled so went into Alpine and spoke to Juliean. They have been putting on Stud Boy dual runner carbides and have had good results. So, I put a pair on my sled and wow, what a difference! No more darting at all, its like riding on rails, they are that good! Although they were about 25 bucks more each than the stock ones, well worth the money IMHO.................Sherm