To start, I know this won't eliminate the questions, that's not what I'm trying to do. I'm creating a source to which people can link or reference when a question arises.
I've owned minis since they day they were released, over 15 of them total (I am now down to 5, two of them still shrink wrapped and one has been in anno for over 4 months. I have seen and owned all versions of all the parts every manufactured for the mini, including some that have never been released. I am not 100% sure on the dates/batches in which these revisions were made/released.
Special thanks to the folks at KEE for all the help over the last couple years.
Some crap you might have laying around if you're a mini owner. sometimes I like to lay it all out and roll in it.
Bolt Guide - Part#27 - Kee added a bleed off hole to vent air down the barrel in the case that a ball or finger stopped the bolt during it's cycle. (red arrow)
Bolt Guide - they also took off one of the retainer screw grooves.
Poppet - Part#33 - Left to right; V1, V3, V4. This does not include the defective poppets, they were machined wrong and don't count as a version. The fix for the defects were essentially a Version 1.5. Version 3 added a spring, to self-reset the poppet (part# 79). Version 4 added a two-piece design to allow for the replacement of the face seal (part# 80) This part is pictured above in black delrin, however the production version is white nylon.
Trigger activation magnet screw - Part#70 - KEE added a threaded magnet to stop the darned thing from falling off every time you opened the grip frame.
Detents Part#36- Made a longer detent and cover to prevent them from turning sideways and jamming. These V2 detents (on left) are the last ones you'll ever need.
The Regulator Part#53 - Version 2 added a flush mount bleed valve, as well as changed the position of the front cap retainer set screw to the top to keep newbs from causing serious damage to their minis. It's also worth while to note that early Invert Minis came with a 600psi micro gauge, while later minis came with a 300psi micro gauge (part# 62).
Main Body Part#1 - You probably can't see from this photo, but the inside diameter of the landing BEHIND the threads was enlarged on later bodies to allow for the use of all autococker threaded barrels. (the old bodies don't fit some large diameter barrels like the old freaks and some J&J barrels)
Polished - a close up of my fully polished mini body
BOLT - Oh and here is my stock bolt, used on mini number 001700 since I got her two years ago, every weekend, case after case, tournament after tournament. Yea she's ugly but.... hey... stock performs the best!