The standard Control Center (made for 31.8mm bars) has 2 very bad reviews on Amazon.com, but I found some pics of Pro Tour dudes with huge computers attached to their Plasma bars using the Plasma Control Center. I've seen the Plasma in person and it's beefy and oval everywhere-- or at least, not 31.8mm round. I'm sure you have accessory mounting issues.

If you already pulled the trigger on the Plasma and you like it, I don't see how you could not try the Control Center. I also don't think many BF members use integrated bars so you probably won't get a lot of direct feedback.