Digi's are the older type microtech with pots for fuel adjusment arn't they? If so that's really good, the guy who tuned it done it well. Apparently from what i've heard anywhere between 12.4 to 12.6 is good for solid power provided your engine isn't prone to detonation which the 4AGE isn't.
At the dyno day it was perfect to see such a wide variety of cars and watch their af ratios as they get stuck into it. I couldn't leave the dyno room cause i was so interested in seeing what cars were running what.
Last year i remember a turbo mirage running ratios above about 19:1!
Yesterday i saw the LS1 Gen 3 running into the 10's cause holden chip them way safe.