I discussed the peculiarities of the CAP configuartion today with Tony Frackowiak.
His observation is the plan-view area of the cheek cowls have to considered when determining the c.g. of that plane.
I agree.
The c.g. will be a bit forward of where it would be on an identical plane sans cheek cowls.
A way to finger this out would be build a "normal" streamlined cowl,... faired from the spinner to firewall, and fly both it and the scale cowl.