Success!
After a few goes at reseating the problem ribbon cable, i now have a functioning camera again - yeah!
Haven't had a chance to clean and put back the Astrodon (although I probably will now i know the steps to disassemble/reassemble the camera), however i'm curious as to what sort of AP results I could expect with no filters installed
Certainly i was getting some 'interesting' colours when testing the camera in the garden just a few moments ago