
Top:
Medeco Biaxial restricted keyway mortise, in a Schlage chassis. Fit an open Medeco key to this via a method that's not likely open-forum appropriate.
Medeco Biaxial restricted keyway I was somehow able to find a key for.
Top Row:
Russwin 6-pin
'Schlageset' (Kwikset pinned with Schlage pins & specs) 5-pin
Yale 6-pin mortise (5 chambers pinned)
Sargent 6-pin mortise (thanks to jeffmoss26 for the blank)
Kwikset 5-pin (boring, I know)
Bottom Row:
Corbin 5-pin
Unbranded SC4 6-pin
Kwikset 5-pin (another one)
Unbranded SC1 5-pin
And yes, they all work:

The Corbin, the Yale and the Medeco not mounted to the chassis were existing keys I pinned the cylinders to, but the remainder were hand-cut. More Kwikset than I'd consider respectable, but had to learn somewhere
