Won`t be a long post, really just posting to share and put the topic in the spotlight for anyone else looking.
Long story short, had the FCB running another rig, sold that rig, got the Kemper, kept the FCB. I liked that it was easy enough to set up and get the basics out of it, but I knew there was more to be had so I ordered the Uno4Kemper chip. Easy to swap it and absolutely no surprises afterward. I won`t go into all the gory details, easier to just answer specific questions but I will offer this: ordering was painless, it was more affordable than I expected, and totally worth it.