I have not researched grip angles, sorry I misled you.
I know that the article being written will go into more detail than anything previously written already.
From your #'s
1. Who knows, can't speculate
2. This is the gun that Mr Krause was able to borrow and I am sure the grip angle of the copies he makes are the same as the old Abermann gun.
3. yes
4 & 5 No way to guess unless they turned up, so I think it is useless to speculate unless we can see a photo and believe it is real.
6. Is the angle on carbines the same as other handgun 1906's? If so, then interesting to guess. If the 45 carbine is fake, then why change the angle to a different angle then the other "known" guns.
I am unsure where you get the speculation that the grip angles were different on the two test pieces? <img border="0" title="" alt="[Wink]" src="wink.gif" />
Ed