OK, the shaved one has arrived, so I now have two of the 24mm fish-eyes. Regular one will be used for an upcoming timelapse project (shooting with it on IQ180 and then processing through Panolapse enables me to replicate anything from a 14mm up to around 60mm lens on FF 35mm DSLR at 4K resolution), and this shaved one for creating full image circle fisheye on MFDB.
So first little test I've done is to put the shaved lens on the ALPA Max (via Mamiya adapter) and then mounted that onto the FPS.
4 shifted shots, roughly +/- 10mm left and right, +/- 17mm up and down (combining these movements of course to shoot the four corners). Stitched together, results in a circular image just over 14,000 pixels in diameter. Weather here in Dubai is not really conducive to outdoor testing at the moment, so I've just done a quick indoor test at f/8. Pretty significant magenta/green chromatic aberration in the output which I've fixed as best I can using Photoshop (-27).
Near center (1.63m from the front of the lens)
Near edge: (2.06m from the front of the lens)
Edge fall-off: (1.65m from the front of the lens)
All in all, I'm pretty happy with this for $600.
Hope to do some outdoor testing towards the end of the month.