PWM Controller Enclosure for FastTrack

I made this little enclosure for these cheap PWM controllers you can find at places like Ebay, Banggood, and Aliexpress. This enclosure has tabs that allow you to mount it to the Rubbermaid FastTrack rail, or you can just cut them off; I don't care.

What do I use this controller for? Why did I need a little box to mount it in? I use it to control led strip lighting at my workbench, another good use is to control fans for soldering; blow the toxic smoke away with as little or as much air as you please.

I printed the main enclosure with supports on and the rails contacting the bed, it printed well on the first attempt. Fitting the PWM controller in is a bit tight but if you get the angle of the potentiometer right and push it all the way forward it fits, just barely.