add another dimension allowing the gyros to move freely stead being fixed within a cube and even more freedom to alter the center of mass could be achieved It'

add another dimension allowing the gyros to move freely stead being fixed within a cube and even more freedom to alter the center of mass could be achieved It's the fact that it is fixed within the cube that allows it to move the cm. That only happens because of the reaction force it can exert against the ground. In the absence of external forces the cm won't move (strictly, won't accelerate). In a sense this is a tautology. So it's not an uncalculated motion that can alter the motion of the c.m., it's an unaccounted for force. When "dark matter" arrived on the scene it was a catch-all for matter we couldn't see. It's only when the explanations for "normal matter hidden from view" fell one-by-one that dark matter took on exotic properties. (In other words, super-smart people have already done the math on hidden galaxies of brown dwarfs and neutron stars being the source of the gravity). I'm betting that if there is a revolutionary simplification to it all, it is because fundamental constants are changing with time. Thus redshift, as ars also speculates, isn't a true measure of velocity. But I understand that super-smart people are doing the measurements on this as well and are finding no changes.