I am trying to help a friend in finding a snowmobile she likes. Some background: She is 5' 7" and around 100 lbs. She has had back problems and only likes to trail ride. She has had a 2010ish polaris trail 550 that was to hard to steer and currently has a 2014 polaris pro 600. She is obviously petit and doesn't have the ability to muscle a sled down the trail. She feels the 600 is just too big for her but I am not aware of anything much lighter than that. Any recommendations on a light weight, easy to handle trail sled? Thanks in advance!