I've found the Ang. can produce acceptable images, but watch the wide end of the lens and its focal tom-foolery. I have one myself for my old Arri SB. It has a distinct 'look.' Call Able and ask for Craig and he could hook you up with a much better lens in an Aaton mount (and he's a super guy). I know for a fact that we have a 10-100 sitting on the shelf right now that isn't being used.
Ol' Jean-Pierre and Aaton lays thier mags out like thus:
D = Super 16mm
C = Standard 16mm
M = Mechanical Drive
X = Magnetic Drive
G = 800'
You know you are looking at a 'C' mag when the slanted roller has its bias to the left when looking at the feed side with the throat pointing to your left. The film is transported to the takeup side via that roller emulsion down which can cause bruising and what not of the s16 negative area. 'D' magazines point the other way to allow for emulsion up takeup.
You know your magazine is machanically driven ('M' Type) when... well it doesn't have any magnets.
You, my friend, probably have either DM or CM magazines. With the older style magazines it is wise to make sure the feed tensions aren't off. They use a wave washer and a leather pad under the core retainer to keep tensions up on that side of the mag. Over time the washer will flatten and need to be adjusted. Newer style mags use three little feet adjusted with set screws and they don't wear as quickly.
Feel free to give me a call. I just started here two weeks ago, but I should be able to satisfy your questions.