I've found that while I can correct a small depression around 60Hz, I need a very high Q filter to do so nicely. Q=8.9 and gain=+15. Without the high Q, the boost simply moves a whole region up, with the nearby peak moving up nearly as much as the depression at Fc.
I'm worried that such a high Q filter doesn't really correct the response so much as swamp a local region with a Very Big Peak. This is not visible on the Tact measurements, but I think a finer grained measurement, like one from AcoustiSoft, might do so.