BK .... apologize for the error. On the other hand, suspect t_b may know a little about firearms too?

Yes, article is older, the intent was to approximate as near as possible given the initial description which was plugged into Google. In any event, your design looks quite formable, and handy. In terms of a " I say we start a "Show us your firearms" thread... " BK, sounds good. Next time start up a thread, am quite sure it will be used. This is a fun area for me, and in the past have worked on a few military and civilian weapons,e.g., new gun barrel replacements, chamber spacing-head checks, corrected, and reworked some operating rods on semi-automatic rifles, shotguns and rifles-stocks/relining, and fitting, and some spot bluing work. Also made a few gages, and dial indicator set-ups for shells and bullets-OD/ID, and length measurements.
BTW, did find some current (last year) notations about similarities and differences-may be of interest.
http://blog.boiledfrog.us/archives/89-Iden...ennium-Pro.html