Tonight I fabricated and installed a repair piece for the heater channel and worked on the frame rail holes left by the crossmember. This is going much more easily than I had expected, thanks in part to having the bus lifted extremely high, and in part due to the parts being much heavier gauge steel here, which is much easier to weld. One of the four frame repairs is complete (except for grinding), one has been prepped, and two remain untouched; I should be able to finish all of these tomorrow night.