OK. That makes sense. Of course it depends on the aquascape whether or not the interference from it would be greater than the loss of the additional distance.
When you say the wavebox needs a clear shot at the far end of the tank, what does that mean? Does it mean an "alley" 4" wide or 8", or something in between?
I am planning on a fixed installation in a compartment in the overflow, so changing it later would be troublesome, to say the least.