I'm looking for any advice on a 1999 Summit 500 with a 136" track. This sled would be for my wife. Wondering if this is a reliable sled or of any known issues with them. How does this do in powder? All riding is done in the mtns and don't want something if its under powered, but she is a light rider. The sled has less than 2000 miles and is in good shape. Any advice or experiences with this sled? Thanks!