Modifying microcode

I remember when the 725 first came out. I was working for DEC at the time, and up until then the only VAXes I'd ever seen were 780s. Somebody rolled this little end table sized thing into the lab and said "Here - this is a VAX." I was flabbergasted - a VAX?!? In a box that small??? No way!! I kept it by my desk until the MicroVAX-II came out. By then I was getting pretty tired of it. Still, the 725 and 730 are the smallest UNIBUS VAXes ever made, which ought to earn them some kind of recognition. FWIW, I have a 725 complete and working. Well, except for the RC25, which never worked even when they were new. It needs the skins for the chassis, though - the previous owner used it as a test system. He never put the cover back on it and eventually lost that part. If anybody has a 725 chassis and would be willing to part with some of the sheet metal, let me know! Bob