Here are the original recordings of the first test.
The curve shows the rotation rate given by the gyro. What looks like a rectified sine is due to the imbalance of the platform performing an unsmooth rotation.
I measured the rate by the distance between these peaks.
Maybe it can be measured smoother just by following the overall deviation - but I was afraid that eventual radio frequency drift could mislead the measurement (recorded via SDR, rotation rate is directly transformed into frequency)
I´ll implement a digital protocol for the gyro data later, but this SDR technique is what I already had, so I used that.

I´ll make another (smoother) graphs based on the overall deviation today (RF deviation seems not to be that problem)

First picture: retrograde, second: prograde, third: same prograde as second pic, but uncut graphics (longer unpowered time)

The thin line below indicates when the thruster was turned on (its the radio frequency of the remote switch)

Questions occured what prograde and retrograde exactly means in our setup:
Only the cavity orientation changed, other things of the setup remained unchanged.