Parametric micro sprinkler

I made this for a very specific purpose, but since it's parametric I thought it might have a broader use so I'm passing it on to the community.

This is a customisable mini sprinkler for irrigation systems. It allows you to change the number of nozzles, their size and spread as well as adjust the size of the connectors to suit different water lines and specify whether the sprinkler should be in-line or and end-stop.

The default values provided in the openSCAD file produce the smallest sprinkler I can print on my Robo3D R1; any smaller and it starts to have problems with consistency and blocked nozzles.

I recommend printing these with the nozzles facing upwards (I've flattened the bottom to assist bed adhesion) without support material and two or more at a time otherwise layer cooling can become problematic causing malformed nozzles