Was unsuccessful in damping the mode.  It made the spectrum really terrible.  I tried increasing the ADS dithers so that they wouldn't get drown out, and that wasn't good.  I turned off the ADS, but we still lost lock.

Kara and I had a look, and the phase rotator filters in ITMX Mode 2 weren't at the correct phases (+40 deg and -70 deg, rather than +/- 60 deg, and their magnitudes weren't unity at the violin frequency).  She used Patrick's gui to put in +/-30 deg and +/-60 deg filters, so that we can hopefully find something that more reliably damps this mode.  For now, it is also commented out of the lscparams so that it won't turn on with totally different filters than it used to have.

Anamaria changed the Mode2 filter to also catch the Mode 4 frequency, and turned off the gain for Mode4. 

Also, we made the Mode3 filter much more narrow, so that the tail of it isn't hitting its neighbors and potentially driving them up.

Ensured that Mode9 is very narrow (it was already an 8th order butterworth), and made mode1 more narrow (4th order to be 6th order) to help prevent it from hitting the mode9 frequency.

I've adjusted the guardian damping settings for ITMX modes 2 and 4.  

Mode 2 now uses filters FM5, FM9, and FM10 with gain=-25.

Mode 4 now has gain=0.

I've commented out both ITMX modes 1 and 9 so that we can make it to NLN now, and find the best damping settings later after we've had a chance to check consistency.