I have been looking for a good deal on a used Warn winch and have seen a few that look pretty rusty and beat up. I have a bit of experience rebuilding electric motors and I don't mind disassembling and refinishing housings, replacing cables etc. but don't know much about the internal workings of a winch. Any advice on knowing whether a used winch that is not currently on a vehicle is worth restoring or not? any specifics I should look for? Any way to test it?