Wow, that baby's gone. Didn't you post this story on here before? Sorry you haven't found it yet. I did look through my list all of the 21s I have seen (and recorded) over the years and have never seen this gun. I did come close though. Several years ago I saw one- serial number 4505 at the Louisville show. 20 gauge, straight grip, 28" barrels, MOD/FULL, $5495. Must have been a run of 20 gauges during that serial number period. I don't remember whether or not it had any of the other changes you mentioned. But I'll keep looking. Good luck.