new guy looking for ideas

[3cells]

This is the only original shroud I'm leaving on,(red part visible on front) I removed the wrap around pieces on the back/prop side for more exposure, less restriction. It also holds the choke and start switch, & keeps the magneto/fan protected. Unfortunately, it's directly behind my seat, with about 4" clearance. I'm concerned about airflow. The onboard fan was designed with stationary use in mind & I'm hoping it provides enough. I'm considering adding some discreet scoops on the sides, funneling air to the back/prop side of the heads.