This scotch yoke pusher design is designed to be as small as possible, for those builds where you want to put an auto-pusher in a Stryfe/Rayven/etc.
Compared to a Rapidstrike pusher, this gets rid of two "unnecessary" small gears and relocates the motor. It also increases the gear ratio to 40:1, which enables the motor relocation but boosts fire rate by 50%.
Recommended usage on 2S with either Fang Revamped for 13-14 dps or a torquey 3S motor for 9-10 dps.
Required additional components:
1xx size hobby motor
M2x5 motor mounting screw
4-40 nut (2)
4-40 screw - 3/8" or 1/2", any head (2)
Rapidstrike worm gear or half of an Ajax Scientific worm gear (https://www.amazon.com/Ajax-Scientific-Plastic-0-82cm-Diameter/dp/B00EPQMKHQ/)
3/32" steel pin as axle. Alternate components can be substituted - a stiff piece of wire was used once during testing.
Work in progress - posting now to build some ideas and potentially help some people.