No problems! Happy to help where I can. Unfortunately, I can’t help on the A/D chip front.
Cabled is my go-to for interspeaker. Wireless is more than fine, but I’m a lazy so-and-so, and don’t want to go find and plug in the interspeaker cable when new firmware updates are available 
Just make sure that you enable cable mode in the KEF CONTROL app. Plugging the cable in doesn’t automatically switch to wired transmission.