Beatslaughter - you da man!
I’ll give a couple of points of feedback now:
Pads 1-4 and 9-12 are fine, but 5-8 and 13-16 don’t work. I had the same problem when I tried editing the BCR2000 (I think) mappings. The pads definitely work fine and are sending the right CC#'s. *edit - Going on a hunch, I decided to set the columns to ‘8’ for each group and they work! Maybe it’s a duplex/API bug?
Slightly related is the fact that the button layout is a little messed up - are both of these related to what might be fixed in the next duplex revision?
On the footnotes (thanks for my inclusion), I can see you mentioned ‘pad 12’ for editing the ‘blinkoff’ option - this is pad 16 on the K49 
Transport isn’t really an issue as it works fine with ‘Message’ and pads 1-8 (panic,snap,noteoff,gm-on,stop,start,continue,tap) pressed provided you set up renoise’s midi settings accordingly.
As for ‘msg pads’ 9-16 (actually named MESG1-8), I’m thinking +/- instrument number, +/- instument slot, +/- track number, repeat block and edit on/off.
I’ve been somewhat busy with personal stuff so I’m trying to dip in and help where I can, but it looks like we’re getting there!
p.s. I forgot to apologise for kind of hijacking the nanokontrol thread - thanks for sorting the new topic too mods & co. 