My contragravity suspension systems work well, but it's a supple trick to place/replace the next LP without bumping inadvertently.....it took awhile to learn the trick without the TT skating away....literally.....
Yeah, yeah, yeah....the DOD and their ilk kept showing up, waving hands, later weapons....they Finally got tired of their various agents 'disappearing' with no trace or clue....
That and most have trouble dealing with a 3D world as it stands....
....even with something as simple as sound.....😏