I beleive that Shirl designed the E racer before Nat designed the Cozy three. It is a widened longez with retractable gear. The E racer is the same width as the Cozy 4. My E racer had a chev V6, supercharged 300 hp engine in the mid location, mark1. Let me put it this way, had the chev engine caught on fire in the mark 1 location, I would for sure not be writeing this post. The engine behind the firewall , mark 11 version, saved my bacon. Fuel burn is all about HP and high speed. Above 200 kts, it comes at a high price.
Jack