BEFORE beginning any kind of remedy, take the time to properly qualify and quantify the problem.

Only after doing so, and getting the complete picture will you have the info you need to consider repair options.

For example, if you confirm it is dropout height, 1mm is easily remedied with a file, though more might call for other ideas.

My signature quotes from Admiral Hopper, and about an ounce of diagnosis..... are there for a reason. Take a short time to measure and think BEFORE starting something that may take a long time to undo.