A buddy of mine had a couple of them.. They were always getting stuck though.. The track's lug height was too low.. They were pretty fast though.. Lots of sleds were made then for sure.. I had an old Skiroule made by Coleman.. (Yeah- The lantern folks) It had some excellent differences from the other boxy machines..
The Sachs engine was mounted low in the frame like new machines but the track was the the worst part of it as It dug itself in to a rut in a hurry!