Hey guys. New to the group and new to snowmobiling. I've never really done much wrenching on a snowmobile before or know much on how to do anything anything beyond normal maintenance. This past winter I purchased a 2007 apex. I'm really happy with the machine, but it rides rougher than crap I feel like. Everyone I ride with has a 136 track and is telling me I should think about doing a track extension to a 136. My first question is how many of you have done it, and how do you like it. Also what do I need to order to do the extension if I did decide to do it. Thank you in advanced.