Ugly doesn't mean it won't run. Ugly can result in a snagged ring so you have to be careful on how much material you take and what the port roofs are shaped like.
I can tell you, you need to lay off the burr man. Burr's are really good for fast material removal to get the general shape. Once you've got the shape you want, you need to drop back to stones and sanding drums. That'll help the "tracking" of the tool that gets the two intake windows uneven.