GUITAR / UKULELE PICKUPS QUESTIONS

If I leave SP-1/HP-1 attached to my guitar, will it harm its finish?

Will a NG-1/2 work for a guitalele?

Can SG-1/2 fit on a 12-string acoustic guitar?

Can KNA bridge-mount pickups (NG-1/2, SG-1/2, UK-1/2) move or even fall off the bridge while I'm playing?

Will the NG-1 or NG-2 change the pressure of the strings on the saddle and alter the sound of the instrument?

Can I use NG-1/2 or SG-1/2 on a Martin Backpacker nylon-string or steel-string acoustic guitar?