The --bab-options will allow it to go higher also.
Mainly the first parameter, the Max speed - it defaults to 55 but will allow up to 57
(but that depends on if your board can handle it that high also)
I set the defaults to match a 'slower' BitFury board so that people who tried it didn't blow anything up without messing with options

I've not actually been able to run it on my 6 board for a while now - so I don't know how well it goes with a lot more boards
(the 6 board setup has been out of my hands for a couple of weeks now)
It may still require some tuning (of the 'Delay' code to get the average down when there are a lot of boards) but until I have a larger board setup to test with, I can't really sort that one out.
Shouldn't be too much longer.
It checks each chip results roughly every 5minutes and then tunes them up or down based on HW% for that 5 min of data.
default is down if >10% HW and up if <1%
I do still have other ideas for tuning (and dealing with dead chips coz they use double or more CPU than a live chip)
Had to switch to chainminer, the speed was tanking to 220Gh/s with cgminer, occasionally going higher and then back. I'll do more testing when i have more time to concentrate on tuning.