If you are having a problem caused by the airflow on the diaphragm plate, blocking it with duct tape does work fine. Once you have established that as the cause, then go to the trouble of running the line into the fuse. Just as I mentioned in the PM I sent you. I recently had this problem and sticking a piece of duct tape over the hole fixed it, so I went ahead and routed the vent into the fuse. Now it runs exactly the same as it did with the vent hole covered with duct tape. the same hold true for the other times I have done it.