Well, something did the trick... I am not sure whether it was scuffing the plexiglass or the white paint (which happens to cost 96 cents a can), but now the motor stand is ready. I mounted it to the duct by using three 2" screws and epoxy, so it should not be going anywhere anytime soon. While waiting for the epoxy to set, I cut 5/16" strips of rubber gasket material in order to sheild the edges of the hovercraft, especially when I am driving inside the house (My mom made me do it). Then, I made some scoops for the front console, because my guess is that the slots on its front face are not going to provide nearly enough air for the lifting prop. Hover test tomorrow if time allows!