He wants the OP to move the common wall where it meets the floor over to the common wall side more. That's the oval.
He wants to trim the guide height down. If it's much over .500 lift or the lobe is an aggressive lobe I give up a bit of flow to help keep the guide from moving around. That's the perpendicular line.
He also wants the OP to move the vein in front of the guide over to the center of the port. That's the parallel line.
I *THINK* that is what MO is saying. I agree with it. Except maybe guide boss length. If the lift is low and the lobe is slow then you can shorten it up.