I also glued one side of each piece at a time, slow going but worth it in the end. Heat does work but test on some scraps first, there is a point where you can go too far and it will just spread like butter, ok maybe not tha bad but it does get soft. I had great succes with heating and squashing in the forearms a little. Depending where the mis-cut is you may be ok, you will have the cover strips, hope that is enough to cover what is wrong, let us see a photo. The maganets I use a very strong and work well, they are 3/4 inch, downfall is when you get a finger stuck between too. Don't stress we all make little mistakes along the way, good luck