So, Poly, opening the exhaust early would be better for reducing pressure? (All else being equal for comparison's sake)
Late closing of intake would seem prone to creating reversion, right?
I understand it from the visual of 2 triangles, intake lobe & exhaust lobe, and where they are in relation to each other (overlapping I closing/E opening). So, the shape/angle of the sides of those triangles would be the clever bit.