Are they on washers? If so, there’s an easy way to pop them off. I put a small screw through a wide, flat bit of wood so the screw head was flush with the wood and about 3/16” of the screw tip was sticking out the other side. Lay it on a table point side up. Set the mini over it with the the point centered in the hole of the base. Press down on the outside edges of the base and the mini pops right off.