i used the ifixit iOpener along with their plastic pry tools which worked really well to get the screen off. and I ended up just scratching off the extra adhesive with my nail fpr fear of scratching the black bezel off. i managed to remove and reattach the screen flush and without any scratches in the black bezel, it just took a while and patient to remove all the old adhesive.

good luck on you build, would love to hear how it goes.