No, it's not quite as bad as that - each unit of 1 on the master dial, will dial up the slave lights Intensity by a half a percent.  So the effect of a single 80% light should be just 80% divided by 7 = 11.4 or so.  I suppose I could scale the master dial so that 100 = seven lights at 14.3%, but this makes it messy for anyone who might want to use less than seven lights - I felt it made more sense to leave the master dial on a 1:1 ratio as the slave lights (even though it isn't, really).

I still have problems with the whole intensity setup going nuts anyway, I'm not sure if this will ever work well. 

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