These drawings were done by me on TinkerCAD.  It was the firs time I've ever done any CAD drawing, hence the clunky appearance.  Apologies for offending the refined sensibilities of professional designers, draftspeople, engineers and artists who know crappy drawing when they see it. The measurements (in millimetres) are correct; only rely on the drawings for general idea of what the stands look like; they are not in proportion to the measurements.  Hope you find them useful.