Nice. I like that pump jack. I've just ordered an Aero 12-B windmill kit for my Jensen 75 to power. Ought to keep me busy for a while.
here is one that I did awhile back , maybe it'll help you with a build.
Yes! This is the video that inspired my purchase. Thank you. Did you use urethane belt material to make drive belts? I should source some for my build. I assume that you machined your own pulleys?
Yes , I make my own pulleys. The belting is 2mm poly belt, I special order mine (black) from Dunham Rubber Co.