This can be achieved minus the gaffer tape (and with a lower height requirement) by allowing the crystals to drain into the lid of the jar, which you will have lined with aluminium foil already. These last drips can then be poured off into the jar of left over solvent afterwards. Keep the lid on while the crystal jar warms up to room temperature. Thus the crystals are exposed to less solvent vapour while warming up than they would be if left suspended over a jar full of solvent.
The necessary act of removing the gaffer (duct) tape in your setup seems to me to be too much opportunity for things to go wrong.
“There is a way of manipulating matter and energy so as to produce what modern scientists call 'a field of force'. The field acts on the observer and puts him in a privileged position vis-à-vis the universe. From this position he has access to the realities which are ordinarily hidden from us by time and space, matter and energy. This is what we call the Great Work."
― Jacques Bergier, quoting Fulcanelli