I was thinking of doing similar - I prefer 2x for gravel and have a hard-on for huge cassettes. Would love to find a combo or firmware hack that could allow MTB Di2 to work with GRX bits.
Btw you kinda can? Currently you can run 11-36t cassette on your system, depending on your frames hanger kength, a 40t cassette might work without a hanger extender.
I was thinking of doing similar - I prefer 2x for gravel and have a hard-on for huge cassettes. Would love to find a combo or firmware hack that could allow MTB Di2 to work with GRX bits.