Why
Hi Stan,
Question is, "Why?" You can't change the weight of the subassemblies. We just tried to build fairly light and the final weight and the balance is sorta self-correcting unless you add heavy stuff like a CS prop and metal spinner, shifting the CG forward. The guys with the 200 HP engines in the -8's often have to put the battery in the rear of the plane to correct CG problems,
Regards,