The extractor (star that has the ratchets) is a fitted part, meaning the ratchets are cut and adjusted for each frame/yoke/cylinder/extractor combination.
Each of the ratchet tips are cut when the extractor is installed in the cylinder, and the cylinder on the yoke, installed in the frame, using a cutting bar/hand. Any additional adjustment that might be required is done by hand, using a special file.
Not something that can be done by someone lacking the tools (and knowledge).
I've only done it in a couple of revolvers, using the tool provided in my revolver armorer class.
Let the company repair it and confirm proper carry up ("timing" if you will).