A truetrac is a truetrac as far as I'm aware. They are on special at around $1200 at the moment. There was no mention of different types when I ordered mine just last week. It's an expensive exercise once you allow $500~ for the gear set, and new bearings if needed. The real cost is in labour though, so don't skimp too much as the cradle might be out again in the near future if luck isn't on your side.