With Jeff in chamber, me outside with the B&K laptop, and Josh taking notes next to me, we did three measurements with three dofs on the ISIK breadboard in its current state without the shroud on. Results have two large peaks at 198Hz and 214Hz. The Y hit looks to have rung up the 214Hz much higher than the other dof hits, so much so that the 198Hz is barely visible. The 198Hz feature was seen in the MC2 scraper baffle B&K results for L1 back in 2017 (alog39750, see the last plot on the attached pdf). That said, I don't really see it for our results back then. 

Setup

Accelorometer axis lined up with IFO axis, hooray! The acc was placed between the M_M2 and R_B3 (photos - attachment 4, attachment 5).

Results