Entirely out of curiosity, does anybody have an opinion if it matters that the exhaust outlet holes are inline or at 90 degrees to the flow from the exhaust stack? It reduces the mill setups by one, which isn't a bad thing, but I was just wondering if the normal 90 degree change of direction would do anything to reduce noise. I'm pretty sure it would impede flow. It seems that the straight shot of Stan Frady's tongue mufflers would be great for profiles with side mounted engines, to reduce oil on the model.
Steve