Can you confirm your statement about the Raptor petcock?
I bought a valve to try on my C-10 last year.
Was told here what to buy. I think it came off a Raptor.
Wouldn't fit the Connie.
I also called the guy that sells various petcocks and he said he had none {from another machine} that would fit a C-10.
NOTE: Looking on Ebay, the distance between holes on the Raptor is 34 mm and 44 mm on the Connie.
I don't have a way to do a measurement, but that 10 mm difference is what I recall on my try..
Ride safe, Ted