I've been working over this file, thought i might present the current version and my process, certainly open to suggestions.
merged from two rotation panos, cambo 43sk, H39, processed in phocus. general exposure was bumped about 1.2 stops, a bit of highlight and shadow recovery
had to fiddle around with color balance and exposure to get the frames close. did this by picking a common area and matching rgb levels with the exposure adjustment, and also for setting wb. didn;t like the magenta cast in the right, so used lenscorrection (scene calibration in Phocus) with a 43mm lens/diffuser shot, previuosly saved. still too magenta, so I used the color picker for a right ceiling area, then de-saturated and hue shifted a bit to the green. finally added a bit of sharpening in PS (amount about 40).
tried photomerging (PS) but auto expanded the RH image vertically (keeping the ceiling pipes straight) requiring too much crop; cylindrical kept the pipe straight. but barrelled out the perimeters, as did auto geometric correction. finally settled with APG.
made a very nice 19 x 30 print, with a bit of noise in the shadows and more halo-ing around the far windows than i would like. had tried various levels of clarity, highlight recovery and un-sharp mask; the halos are in the image due to the backlight and all that blown dust, but not that much