I think "tinker" is a good alternative word. When you make the case about fixing your own car, you'll often get obtuse responses like "Why would I want to fix

I think "tinker" is a good alternative word. When you make the case about fixing your own car, you'll often get obtuse responses like "Why would I want to fix my car? I'll leave it for the professionals." People understand "tinkering" though. This takes advantage of an inherent respect most people in our society have for the hobbies of others, even if they are not hobbies they can relate to.