Me I just start the turbine, let it idle for 1-2minutes, then run it another 1-2 minutes just below mid throttle stick position where the turbine should be coolest, but running faster. Then run it at full power for 1minute (all approx times!) all the time listening for any roughness.
Shut it down and it it’s still quiet and smooth you should be good to go.
Gear, I would not use BVM O ring lube which swells the O rings, the gear is probably mechanically stuck. Stick some buggy shock silicon oil in the fill valve ( does not need much) pressure to around 100psi and operate valve, grab each leg and rock it, the slider should unstick and the gear slam up(down) once all three have moved cycle them multiple times.