Hi @dlang
Thanks for pointing this out 
I design the firmware improvement step exactly as a subset of the holey triangular calibration improvements. It is intended to be kept and built upon. And I can say it improves the results for me (and for others?). Not perfect yet, but better.
It follows this post.
I would like to say that I do work it out with @Joshua to not take months to make it happen. And all contributors are welcome to make it better faster
The complete GC with easy holey triangular calibtation is not yet ready.
Actually @Joshua calls for contribution to improve GC for an easy Holey Triangular calibration.