Dimpling Sling TSI parts with a DRDT-2 and pneumatic squeezer. 

You can dimple without pulling the plastic film away. Works fine and the rivets fit OK after pulling the film off later. I have my empannage and wings done doing them all that way. Evan talks about this in his videos. Hopefully you are reviewing those during your build. I've found them a gold mine. You're more patient than me only pulling part of the film like that. Wait until you get into the size of the wing skins. I agree the film may provide a little bit of protection for scratches or whatever. But I've found the skins are easy to dent. That's the main thing you need to guard against and the plastic won't help.

I can see that the hand squeezer is WAY easier to line up the holes, and therefore quicker. Any chance you could normalize the music volume with your voice volume on future videos? You speak pretty softly, but then the music comes in and blows out my ears.