This problem just started. The shaking does not occur in this bathroom when I run it while I have another faucet open. I opened them all to try to force air out of the line. Any other ideas, aside from trying to better secure the pipes? They are next to impossible to get to. Thanks!
Problem solved. It was air in the flexible supply line going to the faucet. I noticed it was shaking violently at that point, disconnected and drained the supply line, reconnected and shaking was gone. Thanks for the response!

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