Shade Tree Speedster Columbia Two Speed Rear End Test

Just a little drive to test out my new (to me) Columbia 2 speed rear end. The black-faced gauge is the tachometer. 2k is straight up. In the beginning, I'm pumping the pressurized fuel system up to 2 psi. Only one shift of the Columbia into high range near the start, and back into direct drive near the end. I didn't manage to capture the tach as well as I would have liked on the video, but it drops approximately 600 rpm. Also didn't show the speedometer app as much as I should, but 2000 rpm is right at 60 mph. 1500 is right at 45 mph. Much lower than that and I pull it out of OD. I'm using that app because the mechanical speedometer isn't accurate with the OD engaged, reads about 30% low. There's a fix for that, but I haven't managed it yet.