The last part of my career was foundational drilling for earth reinforcement. I don’t care what you have it moves and vibrates. Even 7.5" concrete on 8" friction peers every 4 feet vibrates.. Decouple everything.. Simple. There no exception to the rules. Ask any mechanical or civil engineer, isolate and eliminate where possible.
Check this out there is an overpass that was built, it vibrated so bad when a train went under the overpass for a 1/4 mile in every direction everyone was complaining. They had to go down 160 feet to bed rock and anchor with several strands of wire rope. 130 8" holes 160 feet deep they had to hold 50 ton when stressed. That is called coupling.. Spike are a pure illusion that can look OK at best..
Open the hood on your car or PU, see any spikes for engine mounts.. LOL No one who knows about vibration uses spikes.. NO ONE.. Just in the stupid stereo world.
Get an accelerometer and see for your self.. I have a PCE-VT 3800s. It tells the WHOLE story about vibration.. You can’t argue with the science.. sorry.
Thing vibrate..
BTW it's time to feed the chickens..
Regards