Odd place to start, but I have completed the 8 position switch for manual mode. It’s not too exciting, but it’s done(less the knob). I used the following rotary switch: Grayhill Single Pole, 8 position the pole is connected to ground the rest to digital inputs using the Aurduino internal PULL UP resistors. Solder, heatshrink, done!
More done today… The 4 position mode selector. Same as the 8.