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.
FYI, I did the 0129 upgrade on 10 A4+ today and it seemed to all go smoothly. I did notice that one of my boxes was running 471 hash rate so I took a look and found that the ASC2 card was missing from the miner status/minerinfo section. I made sure all the cables, power and data ribbon were all secured and the LED shows the board is getting power. I upgraded the firmware (0129) twice again to no avail. So I'm wondering what I should try next. I cannot say with certainy if this was caused by the firmware...I have a feeling not because the 24 hashrate shows as 465 on the monitoring page (i didn't bother to look before i guess).