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Well, he's in Japan. If he wants crazy ROF, go find someone with experience with butterfly gears. There are some sector gears out there for short stroke pistons with two short sets of teeth for two piston pulls per sector rotation. The need special tappet plate profiles to clear two tappet pull pins. Two semi auto cutoff lobes too.
That's a neat looking gearset Illusion. Looks like it depends on a common plane for the spur and sector gear i.e. busing seats that are coplanar for the unsprung end of the gears. I guess they made the bevel gear pinion a bit on the long side to assure full engagement with the spur gear.
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