DJS-1000 Make Vinyl Scratch FX? (Track or Performance)

Hi, would it be possible to include a new FX, either Track level or Performance level, which would allow the sample to sound like varispeed.

This is related to the currently-available "Pitch" performance FX, but "Pitch" only offers UP or DOWN.

My suggestion is something that will work even when playback has stopped, but if this new FX is applied, then sample can still be "scratched" around a playhead, like on CDJ's or Traktor, etc.

Thanks so much!