I have owned my 09 Nytro shortie since new. The sled has been great. I had to remove my transfer blocks and make some adjustments in order to get it to lift the skis whenever I wanted to. I love the way it rode after I did that. I am looking to extend the track to either a 128 or a 136, wanted feed back on any negatives. I dont want to loose the wheelies that this thing does, its my favorite part. I bought those du pont slides, so before I cut them down I wanted to look into track extension ideas. is it worth it? I mostly ride groomed icy trails in Northern Wisconsin with the occasional UP trip. thank you