Oh, yes, I agree. When installing the radiator panel, we routed the wood so the panel was flush. I wouldn't install the heat exchanger internally on a basshorn or other cabinet where the woofer magnet was close to a panel. It's better to mount the radiator outside.Internal installation of the device was really only meant for large front-loaded cabinets. If the speaker magnet is far from a cabinet panel, an externally mounted heat exchanger would be too far away. An example would be direct radiating subs in large 10ft3 cabinets. A person could install the heat exchanger internally, and I think it would still help remove heat from the motor.