In case you are worried that the "overlap" method of checking your engine's timing is not accurate enough, let me state that if you are off, you will be off by an entire tooth on the gear. I'm not sure about the tooth count on Saito gears but on a small motorcycle engine I worked on, the crank had 18 teeth and the cam had 36. On this engine, each tooth is 20 degrees of crank rotation, so if it is one tooth off, it will be 20 degrees off, easily discernable by the overlap check.
I have used the overlap method to check automobile engines for jumped timing several times and I always use it as a double check when assembling car, motorcycle, and model airplane engines.