Well done for doing the map. One reason many have not bothered is that there is a resolution discrepancy between MIDI and the D8B.
There is a post on the database about this
http://www.sonido-7.com/d8b/tpis.html#Post16 however I am unsure whether this is the case with HUI as well as nobody ever confirmed this. Briefly its conclusion is:
Page 93 of the d8b manual states: "Note that many of the consoles values are 8-bit resolution (255 values). Since midi conventionally sends only 128 values (two byte MSB/LSB precision is not supported by the d8b), intermediate steps will be interpolated by the d8b." There thus seems to be a discrepancy of 1 step in resolution. Midi gives 128 x 2=256, versus the d8b's 8 bit=255 step resolution. This can be confirmed by looking at the d8b's pan control which has 127 steps either side of <C>, resulting in 255 discrete steps.
So can you confirm if your Pans work okay? When you rotate fully left then turn back to centre does it go back to 0 or L1?