Darting does not cause ski lift. Cornering forces or improperly tuned suspension while cornering will cause lift.
Single carbides will work for most applications, but Dooleys and other double bars have their own problems. I had Dooleys on my Apex for a season and a half, and could never get over 6-7 miles per gallon. The bars would pack full of ice and they would just push a huge trench through the snow, causing tons of drag. Went to triple points and have had the same set on it for about 7 years now.
If you don't want to buy new carbides though, at least shim your skis. You can do that by lifting the lifting the front of the sled and removing the skis and the ski rubbers. Then turn the ski rubber(s) around so the tall part of it is in the rear, and reassemble. Place the sled on flat, level concrete and see if the front of the carbide is off the ground. If not, place a small square of plastic material that's approx 1"x2" and about 3/16" thick (cut up an old hyfax if you have some) under the REAR part of the ski rubber between the ski and the rubber, and check again. You want only the rear of the carbide touching the concrete. Once you have the weight resting on the rear of the carbide only, put a couple small screws in the shims to hold them to the rubber and keep them from piping out. Most darting problems are caused by the skis being tipped downward in the front, paving the skis weight ahead of the ski bolt/axle. You want the ski rubbers to be working to lift the front of the ski, and the weight to be behind the axle/bolt. Getting your skis to be "nose up" will do more for darting than anything, regardless of what carbides you have.
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