Hey there, I used an older version of this tool and modified it to work with KeyLab mk3.
It’s for Renoise 3.1 because that’s what I use, but perhaps someone might still find it useful?
You’re welcome to check it out: GitHub - fomalsd/keylab3-renoise: Arturia KeyLab mk3 integration plugin for Renoise 3.1.1 (API 5). Tested with KeyLab 49 mk3 on OSX 10.9