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It's all fun and games until you're going through the woods and your sled fits through the trees but you forget about the auger behind you Don't ask
Changed my mount to side last year as almost hit tree as I was going under it. Moved it to side.
This is my "custom" milk crate rack and auger mount. Th entire contraption sits on the standard Ski Doo rack the machine came with. Five milk crates are bolted together, the auger rack is repurposed 3/4" plywood shelving. The tipup basket is attached by the shoulder straps to a piece of 1x3 fir bolted to a milk crate. This setup works on an ATV with a metal rack as well. Four U brackets hold it all in place, five minutes to remove it.
The rack is behind the 2-up seat, this picture might give a better perspective.
You have a Jiffy auger there... were you worried about hurting the tree? (jokes!!)