With viscogel (or liquid stacking) we have an airlock that allows solids to move through it horizontally. Have you ever wished you could build an airlock that traps gasses from moving vertically, and allows solids to move vertically (and as a bonus, liquids too)? I have longed for a way to drop solids (and liquids) from the top of a large height, and have them pass through liquid locks along a large fall.  This is easily doable with short waterfalls (set your liquid valve to 200g).  Th