Reference 3A DeCapo " Blue Tak" question

thinnest possible flat layer.
It took a lot of work for me to stretch out a blob of BluTack like product so the final layer was about 1mm thick.
I got it down to a flat surfacr kneading it about 1mm to 1.5 mm in places. Which was 'good enough' and let the speaker flatten it better.
This was on B&W 805s and B&W stands.
IT helped.
When I sold them, the buyer made certain not to take them apart!
(they bolt together.)

I just cut 1/4 by 1/4 inch squares with a utility knife put one on each corner and one in the center of the stand and set the speaker down on it and pushed down fairly hard. Speakers are Dynaudio- works great.

I have 4 small balls (large pea size) i put under my De Capos
and pushed down on to hold them to the stands.

I would not be surprised if you find that applying Blu-Tak to the bottoms will kill the energy and transient attack of the speakers. I was using some very heavy, solid stands under my de Capo's, and when trying to adhere them to the stands with Blu Tack, it dampened the sound of the speakers and sucked the life out of my system. Blu Tack works fine with some speakers, depending on the cabinet design, but on others it kills the sound. I put some Blu Tack under some small Triangle monitors I once owned, and I could not believe how bad it made them sound...like throwing a heavy tarp over them. Some speaker cabinets were designed to resonate and vibrate, and adhereing them to heavy stands muffles the energy of the speakers and kills their "speed". Try it and listen....Start with a minimal amount, one small, dime size piece in the front middle, and one in each back corner. Listen to some recordings that have good attack and percussion (snare shots and well recorded piano pieces) Only use it if you are worried about the speakers getting knocked off the stands.

Blue tak is not as bad as lead or sorbethane at killing the sound of my monitors, but it does mess with the response and micro-dynamics.
Bigshutterbug is right.

I'd like to try roller bearings someday, but Vibrapods seem to allow most of the musical energy get through.