And like I said above... and I am not trying to sell this. Frankly I like them, but they are too expensive as is: the SVS soundpath isolation feet. I found a deal... might've been a store selling damaged goods, but got 2 sets of four in a 6-pack boxes. *shrugs
Not a bad deal for me since I was curious. But they flippin' work! So, there's that.
If you stick with the cones, maybe try a drop... allow me to repeat: A DROP... of the blue thread lock on them. You can still remove them if you use a neoprene utility glove for grip, but they won't vibrate loose.