For the guys who have the newer challenger track machines, do you experiance drive wheel slip inside the tracks? Or does the larger drive wheel remedy this? We have a 65c that has a good undercarriage and proper spring tension, yet at times/certin situations experiance some slip on turns. We washed the windshield off with a garden hose one day, and when we left the farm it went straight across the road at the end of the driveway. Aggh.