Volume. I still maintain that the float needs to be flushed. At around 200mm a 25% turn could do it which is why I call it at 30-50mm for a good rinse. I would be looking for a real catalyst and not some phony stock picker that frontloads and sticks it to their followers! Just looking for XA and GG to run like a finely tuned 55 Chevy! $CMGO