I'm not sure the other repliers looked closely enough at this
For the normal Helicopter Cube at least, this puts the puzzle under a bit of strain (one of the white centers is nearly forced out of the puzzle) and *I* would have said this move is NOT legal as it is technically blocked by overhang bandaging. I sadly do not own a Curvy Copter so I cannot confirm that this blocking is present for that puzzle.
Of course, seeing as it is your puzzle, you can do whatever you want
Would you like it to be legal?
In any case, such a tight move is not necessary to solve a jumbled Helicopter Cube and this particuar maneuver does not introduce any new positions to the jumbling state space. Jumbling sequences exist that perform this same action without straining the puzzleI have also run into an occasional situation on the Helicopter Cube in a jumbled state where neither of two particular moves can be made because of overhang bandaging but making BOTH moves simultaneously causes the previously overlapping sections to mesh together in a gear fashion and rotate completely to a new position with no strain on the puzzle whatsoever. Is this combo move considered legal? The more you allow, the exponentially more difficult it is to model this puzzle accurately, and it's already difficult enough!