How long did u do the acid rest? What temperature did you ferment at? How was your pitch rate, under, over, right on?
Ferulic acid = zero minutes.
Pitched cold like 58 F. Brought up to about 68 F on day 3 or so to finish.
This was a pitch rate experiment, too, actually. One I pitched "normal" per mrmalty.com, the other I pitched only 1/4 as much. Didn't matter. Couldn't taste a difference between the two batches at the end anyway.