Since the Shapers are new for this year, its doubtful that any consumer has usage w/ them. In speaking with Ron at StudBoy, he swears its not a gimmick. In looking at them myself, I tend to agree with Ron - I believe that they will work just as intended.
At the first drags last fall, Matt had 126 registered sleds (signed waiver) throughout the day. The second one last fall was bigger (more sleds), but I forget the final tally of signed waivers... A very nice turnout... :-)
Naw. I'll probably be working the trailer again with Matt. He's gonna need the help this year; plus I won't then have to rush the track-swap on my sled....