BTW, what you see in that cowling picture is about 3" deep of pink foam. Yeah, it's painted black. It's there for two reasons. It fills the area where I want to block cooling airflow from going. And it helped round out that oblong fiberglass cowl that Phoenix QA should never have passed.

Where the foam is would be plenty of space for any forward ballast you might need.

BTW, any model airplane manufacturer who puts a slab of lead into an airplane to make up for lousy wood selection or poor design would be better lost to a hobby they don't understand. And a mfg that throws an egg shaped, poorly trimmed fiberglass part like I got really should shift their production to Barbie dolls. I've had two Phoenix ARFs and both showed a real lack of understanding of the hobby. It's pretty amazing what the ARF mfg's don't know.