Im guessing if the rear wing really does move like they say that it just tilts. Like picture the wing having some internal parts not being hollow which come up through the 2 stems & just slightly tilt only the wing bar itself not the stems too but they controls in the stems (wires & what not) just tilt the wing blade up & down. That would make sense & be subtle yet still very useful. In any case this thing is going to be a beast it seems. To bad I have already dropped a ton of money into my 610 & don't plan to switch it out for it but i'm sure i'll know a couple people with one I can take for a run