I picked up a used S61 MK2 and ran into the issue with the LightGuide, namely not being about to turn it off. My son and I figured this out and put a python app on Github. It seems to work fine when Abelton is present. Be great to hear your feedback and any issues. I can't post the full link but the partial link will help you find it.
https://github.com/AMoir117/KompleteColorController
