Taming Gimbal Noise on an AMIRA

Trying to isolate camera noise from an AMIRA mounted on a DJI Ronin 2 is always a balancing act. For a recent commercial, the DP wanted some super-slow, creeping push-ins that demanded absolute silence during some takes. My initial thought was to use my standard Rycote InVision USM mounts on the C-stand, but the vibration transmitted through the Ronin's pan and tilt motors was still subtly audible on the MKH 50 we had mounted as a room mic.

What didn't work was trying to 'sandwich' isolation material directly on the gimbal arms, too much risk of interfering with balance and motor performance. What did work surprisingly well was suspending a secondary, smaller isolation frame for the microphone within the Ronin's cage itself, directly below the AMIRA. We rigged a DPA 4018 in a subtle, miniature shock mount, then attached that shock mount to a small, lightweight carbon fiber frame we zip-tied to the Ronin's vertical arms. This created a 'double isolation' effect: the Ronin's own isolation from the sled, and then the mic's additional independent isolation from the gimbal motors.

This setup drastically reduced the low-frequency rumble and high-frequency whine from the motors, giving us cleaner dialogue tracks on those delicate shots. Has anyone found a more elegant, perhaps even off-the-shelf, solution for this kind of 'mic-on-gimbal' isolation challenge, especially with heavier camera packages?