I know this has been beat to death, but I have searched a lot and still have questions. Just want to get it right. I have an 09' 153" MTX, and am having the terrible hifax wear problems. I just ordered two sets of the marginal wheel kits. I see most are only installing these at the front of the skid just behind the curve. I also am seeing just as bad of wear problems about 9" in front of the rear axle. I was going to install a second set here. From what I can see here on the site most are only installing these wheel kits at the front of the skid. Thoughts, or any ideas on using this kit at the rear wear point as well. I have the Hartman ice scratchers on both my MTX, and 07' Phazer Mtn. The tracks are set up as loose as I can without racheting now. Many thanks for any/all input I can get prior to drilling holes in my machine.