As far as the Maxx boys, they've been fantastic. Several years ago I found a Maxx billet upper on OSO in Florida for smokin cheap. Had it shipped direct to them, they checked it out and it was pristine. So I bought another Imco lower and made that my spare drive. Some day, when I can get both drives in to them we're gonna swap lowers and I'll have a solid main drive with a very good spare.