On Thursday night (sorry for the late elog) I decided to give the MCL FF one more try. 

I first remeasured the actuator transfer function because previous measurements had poor coherence ~0.5 - 0.7  at 3 Hz. I did a sine swept to measure the TF. 

Raw transfer function:

The data is attached here: TF.zip

Then I made Wiener filters by fitting the transfer function data with coherence > 0.95 (on the left). Fitting all the data (on the right). Here are the filters:

The offline subtractions (high coh fit on left, all data fit on right). Notice the better IIR performance when all the TF data was fitted.

The online results: (these were aquired by taking five DTT measurements with 15 averages each and then taking the mean of these measurements)

And the subtraction performance: