I've put another nine hours into the underside of the cab over the past two days, though the changes aren't all that noticeable from just a photo. For example, a solid hour went into just replacing the floor at the base of the throttle pedal area today.
The rest of the time went into smoothing out welds and welding areas that I had skipped over until the cab was on its back. Still a little ways to go before it sees primer.