For anyone curious, you can turn these A4+'s into A6s. The control board has enough ports for 8 hashboards and 4 fans. I changed over 30 A4s so I only have to monitor 15 ASICs now. Way better. The inno support guy gave me an older firmware that supports it, the latest only ran 6 boards total. He said there should be a new firmware today or tomorrow that supports all 8 again.
Thanks, update_180129 appears to have no issues running all 8 chains.
Just made the exact same change to 10 miners today. Appears to work just great! Along with halving the work upkeeping them, the best benefit (IMHO) is having spare controller boards now.

I use separate PSUs for each tube, and this has no negative impact either.