I've always built my TE's on Pattern models to 1/8" thickness. Never subscribed to the real fat and even flared TE's that became vogue a couple years ago...don't believe in those.

Squared LE's are non issues for most models too.

However, if one wants the maximum speed for minimum energy input, the better approach is to have rounded LE's, thin surfacesand razor sharp TE's. Don't have to look very far to actually see some of those characteristics in action......pick up any APC prop. In my experience APC props in general are the best in converting available power to thrust..... minimal noise generation also which goes hand in glove with thrust generation