SmuffyYou really shouldn't ever be winding up. It's a bad habit to get into, and causes you to spin too early. The way you should be generating rotation is by making yourself more compact once you leave the takeoff.
That's the quick version, but the point is, prespinning is for noobs
I feel like it depends on the rotation, the jump, and what you mean by prespinning. Are we talking like ssx tricky where if you prespin 100yards out you spin like a top, or simply initiating the spin with your arms.
Idk, I feel like you can get a lot of power from your edges and arms, and still pop perfectly fine, and send it clean.
I probably couldn't even do a 7 on skis at this point anyway so my opinion doesn't count for much.