Suhweet. Friend of mine had a CR500 he did up as a trail bike, it was surprisingly useable in the woods and would climb any hill ever.
As for the timbersled- I STILL don't understand why nobodies done that yet (well, i guess I've seen some versions on a CR500 but no report as to how they perform). If I ever get my 495 pieced together and if I can ever afford a timbersled, I'll let you know how they work. Don't hold your breath though, that's a lot of ifs.
Can't wait to see how it turns out!