Little issue with airflow, moving up to a 13W motor on the fan almost makes the unit want to take flight. The airflow gets well directed, but once you see the outside of the case on you'll see its got 2" of clearance all the way around.
I wouldn't want to split the condenser though, these small ones help quite a bit. We're not pulling much in terms of power actually, sub 300-400W at most according to the kill-a-watt. So 25uf is right for these. Right now I'm definitely undercharged though, and being in vacuum doesn't help their temperatures.