I hear you on being that close to the finish line and things going awry. Been there many many times. Usually at the tail end of a build I'm scared to death of handling a near finished project just because of what you're talking about with things coming off. To help with things not falling off like outside rear view mirrors and door handles I usually pin them to the body so they're more sturdily mounted. The cals......man....I hate to hear that for you but this build turned out very well despite all the trouble you had with it. Great work!!!