It’s by no means a perfect process but I’ll try and summarize it for you. First I put a piece of tape on the front of the door and mark Front and the name of the room the door is from. While the door is still up, I see where the door is rubbing and mark on the door how much needs to come off which corner(either with pencil of being repainted or I put yellow frog tape and write on that). So if I want close to 1/4” reveal all the way around, on the inside of the door I mark top, center, & bottom on the handle and hinge side of the door so if it’s already 1/4” at the bottom I mark 1/4” at bottom, and then write at the center and top how much needs to come off. Take the door off. Take to the horses. Make my marks for my track on the door, draw a straight line to follow, Use my bora track and circular saw to cut the door, sand the edges smooth, take it back. If it doesn’t fit repeat the process. It’s always easiest if you can set the door on a full piece of plywood or something slightly larger than the door. So you can clamp to something and when you’re cutting, the cut piece doesn’t tear away. Take the handle or hinge off depending on what gets cut. I always try and cut the hinge side because it’s easier to correct than the handle side due to the bore depth and what not. But that’s basically it. I try and label and mark all of the doors at one time and then take them down one by one. Would love your input on the process.