Well, it took a few days of waiting for more conducive weather, but fully back in service.
U-Bolts that clamp mast in rotor were loose enough to rattle! All tightened and double-nutted to hopefully prevent a recurrence.
Clamp that locks mast in rotor is loose, allowing mast and antennas to windmill slightly - just enough to lose sync with controller.
Tower is nested and a rope tied from end of boom to house to stop spinning. Big storm coming tomorrow night that will delay chance to fix.
Guess it is time to drill and pin the mast in the rotor clamp.
Tower work to replace the 20/15/10 tribander went very well, in spite of being accomplished by one very creaky old fart.
Should have no effect on HF posture for the Gateway as no changes were made to 135' EFHW.
Big change is performance as a client connecting to other Gateways, and to use for routine personal Ham activities.