That upgrade makes the Luke ROTJ look so much cooler. I might have to get that. But I'm wondering... if I wanted to remove it sometime would it peel off without damage to the saber?
It won't damage anything but after it's been on for a while and you peel it off, it will leave a sticky residue :P
that you'd need to clean off with something like Goo-Gone.
It's an agressive adhesive and likes to stay put ;) but it won't peel up any paint if you decide to remove it
if that's your concern :)