As ozzy says. You have to loosen (do not have to fully unscrew) the four large screws at the base. Then you will be able to move the base away from the rest of the speaker enough to get the spikes out.
I successfully installed the Gaia III's on my Sopra 2's and am very happy with it.
I successfully installed the Gaia III's on my Sopra 2's and am very happy with it.