I don’t know about ‘designed’ but I think it does. If you built them with a sloppier fit, I bet you could line one side of the gate body with a smooth rubber gasket and that would really be the bee’s knees for sealing against the vac. Might play havoc with my GRIT gate actuators, but throwing them by hand probably wouldn’t be hampered at all. 

Ryan/// ~sigh~ I blew up another bowl. Moke told me "I made the inside bigger than the outside".