Doug, I sure am, with every job, on both my 16 and 20' screens now. Only one change, I have removed the actual valve, and I am just using the PVC Y pipe. I just put it in line, and the air blows right by the opening while filling the screen, and once filled, the extra pressure seems to come out of the open hole. Stupid proof! In all of the times that I have used it, I only closed it off once. Last year I posted about the winds really coming up on me during an event, the top tube was bending down, and I taped over the opening to increase the screen pressure (and I sat on the rear tube to keep it down) But I would say it was a success.
-- Neil --