If your base is auto survey you can move it but every time you have to wait for specified amount of time in survey in config. If you will use only AB line and don’t care about repeatability you can leave it like this if you fix position your AB lines will stay in place relative to base.
For cab suspension.
Teensy 4.1 will replace nano on PCBs in future.
Yes 1 deg of bad roll is ~5cm error on 3m antenna height.