An obvious question is "How many cues does your system support?". The short answer is infinite. Each SmartRail supports 16 cues and we can add as many SmartRails as we want. However, there are some caveats.
The system gets a little more complicated once you get above 400 cues. The RS485 bus will require a repeater unit to extend to more SmartRails. I probably shouldn't make any promises above 400 cues until I test the repeater unit, but I'm pretty sure it will be straightforward.
The system gets even more complicated above 10,000 cues but until and unless someone wants more than 10,000 cues I won't give it much thought.