Good call on the ozone. I had to remove mine. In addition to injecting a ton of air into the system, it also screws up the ORP readings as the ozone is injected on the suction side right before the intellichem intake.
Intellichem is working wonderfully. One issue is that when the weather dips below 30, the flow cell will most definitely freeze and the unit will not work. I am not sure what type of damage this causes to the sensors, but I'm sure its not good.
I am currently looking into designing a custom insulated wooden box to build around the intellichem panel, flow cell, and injection pump. The box will have a hinged door to access the equipment and holes on the side for electrical wire and plumbing to make it through. This will protect it from the cold and UV rays.