Ted,
I assume you are talking about the mod where you attach an airplane prop and use it to push a larger stream of water?
I did the mod where you cut where the water exits from the Maxi jet. When the maxi jet starts up it can spin in either direction. So if you cut off where the water exits and you hook it to a wave maker, some time the water goes one direction and the other time the water goes the other direction. This I know works well. I don't use a wave maker, I just unplug and plug in my maxi jet every few days to alter the currents.
Hope all is well. I am curious to see if anyone locally has done the mods you speak of.
Cheers,
Chris