Yes, thank you very much BenF! Without your contributions I would probably not use my nano as much as I do because you made it fun to use!
I hope you will be working on the quad firmware in the future and bring it to the same BenF standard 
I guess you have a good starting point now which you can adapt to support the quad. You are a expert on UI so I think you will sort the extra channels out very nice
And I also wish for more open source collaboration so others can hack on FFT for example with your latest enhancements.