rub marks on gaskin

I have been doing alot of snow plowing lately, which involves alot of tight turns for me. At any rate, my horse is starting to get little rub marks on her gaskins from the traces. They are not really bad right now, but I have decided to that I should come up with a solution for these before the rub marks get down to the skin. Any tricks out there? She works in the V-plow without shafts, and she mostly gets the sidestepping right when we make tight turns, but with lots of turning it just gets to be too many little mistakes and her gaskins suffer. I thought maybe I could wrap her legs or put something over the traces to make them less abrasive. My traces are nylon, are they more prone to rubbing? I do have a set of biothane traces I could swap out… Is this a sign that I might need a wider single tree? I have a 32 inch single tree and my horse is about 17 hands, maybe 1700 pounds. The singletree seems like the right size unless I’m doing a job that requires alot of turning…