Southern Area Rocketry (SoAR) uses a combination of Quad Pods and Spad Pads at our launches. The blast plates for the Spad Pads are ceramic grinding wheels that have a 1/2" hole in them through which we run the launch rods. The Quad Pods have a 1" hole in the blast plate through which the rod/rail is attached to the pad. My question, "Does anyone have a recommendation for a 'plug' to keep exhaust gases from getting down the hole and onto the pad's/pod's inner workings?" Yes, I'm tired of cleaning the lock down screws.