I also use SpecTape. I probably got it from a local store ages ago and have continued using it since it has a strong hold, but you can shear parts apart pretty easily. Never any residue; usually, I just lift an edge and then roll it up with a fingertip. Really like it. It's the paper one; I never knew about the plastic-backed until this thread. When I looked that version up, it does indicate it's rather permanent.
Coincidentally, just today I received a roll of 1" and 2". I ran out of my 1" and never thought to look for 2" to make backing parts boards for the Origin faster to lay down. Now, if they made a 4" roll
![Tongue Out [tongue]](https://www.festoolownersgroup.com/Smileys/default/tongue_smilie.gif)
When I first found XFasten, what turned me off from it was that the adhesive is silicone-based. Usually, silicone and woodworking don't mix.