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Hold Servo Switch

X = On/Off Toggle White Red Block
A & D = Input White Green Block
Blue Adust Speed
Green = Output

This must be connected to servo with hold function NOT toggled

Basically this turns the hold toggle on and off with logic instead of using the servos settings. This allows you to use any servo in both modes for one build, or if you are using hold it gives you a way to auto reset to center. This does stop slightly in the center when in hold mode so its not perfect but it works.