So how did you have a collision then?

I checked mine after the gears and chain were installed. I don't see how it can hit if you verify that piston TDC and valve opening / lobe center are ok? Just trying to learn. I have a degree wheel collecting dust somewhere... never used....

I needed to replace a stripped out eccentric key so
I never changed the alignment of the gears just slid a new (right size) key in. I wanted to check what someone else had done way back when because they did not install the cam retaining bolt correctly.