That is a different table (just looked at the HL website photos). As for it being unstable if you unscrew the base, if it doesn't wobble now, it should not wobble if you remove the hold-down screws. Those just keep it from sliding, they don't really add to the structural stability. Try it and see for sure. As to remounting it, use the same screws if they're not stripped, or similar length ones. I do not believe any wiring is run through the floor of the slide, only under it and into the walls. You could contact the HL brand manager for Big Country to find out for sure.