I'm currently working on the R2 manual. I'm working on bringing the wiring section up to the same standard as the rest of the manual as it was never finished. I will also be updating it for the switch to the SKR controller.
Once that is done, I will be working on the FT-6 manual as well. I was not aware the change had been made and units had started shipping with the SKR. I'm trying to catch up. I have not played with the SKR yet, so I can't help much at this point.