7092 is not phased in yet and won't be until July, for now all wavebox and nano wavebox still include 6091. The 7092 is still in very limited production, the circuit board has not yet been made in any real quantity.
The drive unit can come out in shipping with a strong hit, the bushing and attenuation disk sits down in the pump on the shaft and would only be visible by shining a pen light into the pump cavity, it should be there but it does not just come out. If these are missing it is not a big deal we can send you one.
The wavebox is generally noisier when new, the parts have to wear in and seat, we recommend running it at 18V for 2 weeks, this will reduce the noise during wear in. If the noise is just a hum and the bushing and attenuation disk are there this is all that is needed to solve the problem. If you could better describe the noise (click, hum, water rushing), it will help solve the problem.
Wave height is dependent on tuning and tank layout and construction. I think 2.5" in a 90 is a dream and not reality, I have never said that such a wave was possible, probably these same people exaggerate there anatomy as well. If you read my posts, I have never said more than about 1.5" is possible on a 4ft tank and in general anything more than about 2" of wave is extreme stress on the tank. You will get a wave of 3/4" to 1.5" once you hit the right frequency. Only one frequency makes a wave in a tank and maximum wave height requires the top sticks out of the tank, voltage is at 24V and that there are no rocks in the way of the output. It also requires patience to get the exact frequency, this can take 2-3 hours of trying.
I can certainly send a photocell.
