nothing can beat a good old fashioned practice...on a fiddy!! haha!
Im just way too big for the 50s and 80s. I cant maneuver them. I recently bought a YZ80 for my wife and I can wheelie the sheeyot out of it but its uncomfortable as hell and just an all-around pain in the arse. Id rather just practice on the 1000!
those kinda suck, most of the time they wont let you pull the bike past BP, and some yank you back down right at BP.. not to mention its already on a incline..etc.. but still can help somewhat. just get a Fiddy! haha more fun IMO.
*edit: and if you really did some of that stuff that people were doing, you'd flip your bike and be on your ass in a second. LOL