I've been debating what to do for a while here and just thinking, for a direct port NX kit I would need 8 nozzels.

would I need 8 fuel and 8 N2O selenoids?

and for jets can I get jets small enough to run a 150 shot direct port?

 

you can do it with 2 or 4 solenoids,4 being the better setup.
you can get jets for a 150 shot,but the jets will be very small and would be prone to clogging.

IMO a direct port isnt worth it unless you are going to spray over 200.