I had to replace the stack top detection lever sensors in the finisher, which requires disassembly almost to the baseplate. I was not fully paying attention to some things as I was tearing it down, so this gear timing has me confused. There is nothing in the manual about it. There is a black cam gear in the front drive section that controls the up/down movement of the knurled roller. It is driven by a spring loaded split gear that is released by a solenoid. I know there has to be a certain timing between these gears, but there are no timing marks. Can anyone give me a reference point to time these gears properly? Maybe if you have one available, just snap a picture of them? Thanks.