I recall Roomtunes as acoustic treatments that one put up in corners etc., although I know they did make stands and other things. Love the granite under the TT!
My stands are from SolidSteel. Shelves rest on inverted cones whose points fit into dimples on the steel crossbars. Very sturdy, and filling the vertical tubes with sand made a slight improvement. Does it sound better than other racks? I dunno. Auditioning racks is not high on my list of priorities, not to mention being a pain.
One major surprise of my audiophile life occurred when I put Herbie’s Thin Dots on top of the cones (so the MDF shelves were no longer directly touching the cones). I wasn’t expecting to hear any difference; but I sure did!