So doing a test run of the beast. Went down my long gravel road and then back up, engine died as I didn't have the idle up far enough, and then it wouldn't start for about 15 pulls. Finally got it started, drove around the sharp curve to go up to my driveway and the engine started to make a clinking sound. Shut it off. The motor won't turn over by hand and the governor arm that sticks up through the top of the motor fell through. So I guess I broke the governor. Going to have to get into it and see if I caused any damage to the internals. Something to do tomorrow.
On a side note: I think I definitely got the gear ratio right, this thing flys!