For the same ruggedness, add 50# of structure. Then, for the same performance, add another 50# of engine. Then, for the same ruggedness, add another 25# of landing gear and structure, then, etc., etc., etc……
Van’s is renowned for optimization, most notably of the hershey-bar wing. That RV’s outnumbered all other aircraft combined at KOSH testifies to the success of this approach.