Do any of you have any experience in having MSD boxes rebuilt as compared to buying new? I have several boxes that seem to be okay, but would like to have them checked out instead of buying new this year. I wouldn't ask any other year but this year things are a little tighter and don't want to waste any money, but at the same time don't want to start out with junk. Thoughts and opinions please. Positive comments, post here. Negative comments, please PM me. Thanks!