Missed on this combo?

agreed. but without a flow bench...........
My opinion is that if or when he goes down that road, that he epoxy it in, in several ways, then take it to a flow bench and see which one.... #1, sounded the smoothest and didn't kill the flow. Then go back and make all the rest shaped that way.
I don't see filling in the bowl will give him ANY more flow, But, if he can get better/smoother flow THEN he has gained power. if it start to screech in the port...........well the air is traveling in the port like a super ball would in you kitchen. erative uncontrolled flow.
Behind the guide, in the bowl/roof area, if its fill back in......don't think it will be a plus.
I have only seen a picture of that head/ port so I really have no clue what it's going to do and neither will the op if he don't get it flow after......by the same flowbench/operator as he did before.