Dealing with multi-piece rims is sort of like bailing out of an airplane that's in the process of crashing- - - - -doing it right the first time isn't just a good choice- - - -it's the ONLY choice! You probably won't live long enough to regret your error! I've been tinkering with big rig tube type wheels since the 1960's, and there are all sorts of little things the pros do, and little wheel condition details they notice that make the difference between a safe, easy job and one that can ruin (or end) your life!
Jerry