TiGuy,

I wouldn't worry too much about scaleness for Q40. The Sidewinder (aka TRC-1) was never even built in full scale. Take a look at the license taken with the drawings for the proposed full scale aircraft versus the Small Creations rendition.

Also, the P-51 variants are NOTHING like the full scale planes. If they were, any Miss Ashley/Vendetta would have a big nose designed for that huge Griffon motor with the contra-rotating props.

Make your plane look nice and sleek, and somewhat like the full scale plane and you'll be closer that the current dominators of the event.