If the CAS is out of alignment by even one tooth, the engine WILL NOT run - there are probably only 10 teeth to assist with alignment, so one tooth is a BIG mis-alignment. If the half-moon key has been broken from the end of the exhaust cam, there is NO guarantee you can align it back to where it came from. The only way is a good sense of visualisation to align the CAS correctly.
Even with the CAS mis-aligned, you should still have spark and fuel, just not at the right places / times. This tends to suggest the CAS is cactus. You didn't get paint inside it, did you?