I live in the top floor of an apartment building and get self-conscious about playing upright early or late in the day, as I would think the sound resonates through the floor (maybe I'm just paranoid). I know there are the grippy rubber endpin holders that keep things in place, but I'm wonding if there's a similar small device that somehow, through the uses of layers of foam/rubber/etc., decouples the bass from the floor? I realize I could probably make something myself, and that I'll have to adjust my endpin height to account for the thickness of the decoupler, but does anyone have and thoughts/ideas? I've been using a folded-up towel, but want to graduate to something smaller, more legit, and better looking. thanks!