This pertains to the Ultra SSs, but I thought it might be of interest.
In '09, I took a pair of LSA1 Statements to my home in New Mexico with some nice stands and six OEM Stillpoints feet for between them and the stands. I never was told that they needed to be unlocked. Last year I sent these speakers to have Urushi cap installed. In just put them in place five days ago and really didn't like what I heard, but thought the long unused electronics, new caps in the speakers, and high sensitive HFC cables must need breakin.
Today I noticed the similarity between the OEM feet and the aluminum version of the Ultra SSs. I thought that perhaps the hard hats needed to be unlocked and sure enough they were all tight! It made a big difference, but I them remember how awful the Ultra ALs sounded. Having six SP Ultra SSs handy, I replaced those under the speakers. Wow! It really is hard for me to believe how much impact vibrations can have on ones system.