The BME and ZDZ you are talking about are both way more powerful than that little ol' H9 Edge needs. If I were you, I'd return the Edge and order the new H9 80" Cap or a GP 33% Pitts.

BTW, I have the H9 Edge and it's a fantastic plane, but it's more suited to a big glow engine and I've grown tired of messy glow engines.....hence my recommendation of returning the plane, not the engine.

Wiz