Lower frame is complete, we made the rear engine frame and the suspension arms the wheels will mount to (neither are pictured).
Also milled the keyway for the wheel hubs. Unfortunately, while cleaning up the axle on the lathe, I really messed up. I had the lathe spinning way too fast while drilling my center hole for the live center with about 4' of unsupported length flapping around behind the lathe head, which unfortunately bent the axle right in the center. It's bent on a sharp line. It's not horrible, but when laid out on a flat surface, the two ends are touching the table and over the 60" length there's about .75" of a gap in the center. I have a shop press with a pretty large V-Die, I think I can correct the axle by manually bending it back to be straight there. How big of a deal is it for the axle to be perfectly straight? Would it help to put a third axle bearing right in the center of the go kart? Obviously not the way it is right now, after I try to bend it back to straight. Who knows, maybe it will come out perfect after I try to correct it! But I doubt it...