Yeah, unfortunetly I cannot fill the pier. It has a threaded rod down to the bottom of the pier with a nut which enables me to take the mount off without having to undo the leveling bolts. Filling it with sand or concrete will mess up the system.
Vibration is not too much of an issue, the steel is a lot thicker than most piers I have seen and is very solid.
Next step running a thousand cables!
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