The small ones were supposed to be for the service coat and the big ones for the overcoat, but apparently flight schools were kind of laws unto themselves about cadet chevrons.   https://www.usmilitariaforum.com/forums/index.php?/topic/192866-help-identifying-these-air-cadet-chevrons/

The Military Collectibles Shop will be holding its first workshop tonight on "How to sporterize your Military Rifle" - using the proven Williams method (books and rifles not provided). We will show you how to: 1) Remove those pesky bayonet lugs once and for all. 2) Shave down that stock - who needs all that wood? 3) Drill baby drill- multiple holes for different scopes! 4) Grind that barrel down to barely legal status to impress the deer. 5) Bondo over any inspector marks and arsenal stamps - make it your own! This works well with all WWI & WWII rifles, but we can even chop down and checker up a Civil War Spencer carbine! What's old will be new again! Next week we will go over other topics like "Sniper scope removal" and "chrome is king!" -See you tonight 6pm! April 1st...

With great speed

Great collection, doughboy! Thanks for posting it. If you get a chance please post a larger photo of the Honor Guard (HG) armband (on the lower right in the photo). Thanks!

Not necessarily.  In My opinion that’s more dealer lore than reality. There does seem to be a collation for the longer touchback pen on some of the wings that were made post World War II (such as Gemsco) but as a rule, that can be applied to all wings, I don’tbelieve that’s accurate.   And functionally speaking is really no line drawn in the sand between 1945 and 1946 that we can say “on this specific date, they made a choice, and changed up how they made the insignia “   Also, when the war ended up to, and after the Korean War, there are lots, World War II vintage insignia still floating around.    

How would you insert mittens into gloves?

It appears to be the type worn while underway, not a veteran thing, though of course veterans can wear them if they wish.

Hello   Very good collection 

The BO DRIVE marked knob I have is painted metal, same as the pull light switch knob

Has a re-enactor / put-together vibe to me.  I never say never, but we only got issued one canteen as part of our TA-50 - I’m not even sure where I’d have secured a second.  In three years of (combat unit) AD, I never saw two canteens carried.  In addition to living on FTXs, this includes 45 days of desert training in the Mojave, and (“tell him what else he’s won, Johnny!”) an extended all-expenses paid trip to a steamy jungle spot.   The true giveaway for me is that the sizing straps aren’t rolled / taped.  If you’d have showed up to formation in my unit with those ATFU “rappellers” those two canteens wouldn’t have saved you.     “Top” would have made sure of it…