Derek,
The E-motion has only the side vents. One entry vent and 3 exits. The rudder post is solid. I did add the front bottom venting for the motor and 4 openings in the firewall. (all 3/4" diameter) Meeting Chris tomorrow for some practice. I should have even a better impression of the E-motion after that. Bill is correct the E-motion does seem to be a little slower in the downlines. Very clean airplane yet does not build up speed. I'm currently using a APC 20.5X14. The plane performs very well with it.