The motors were moved using the pneumatic only, in and out for several cycles to gauge the effect on the vacuum. For the left arm no change in pressure was observed. For the right arm a small increase of 0.04e-7 mbar was observed which was quickly reduced by the turbo. 

The detectors were then biased to see if movement had any effect on the leakage current (large effects were observed in 2021 beamtime). Movement of the pneumatics saw no observable change in the leakage current above normal fluctuations. 

Both motors arms had been sucked into the chamber by 5-10mm due to the vacuum before starting the movement cycle. After one movement cycle, the motors returned to their normal fully out positions and remained fully out.