Another Wanhao / MonoPrice Maker Select Fan

Yet another Wanhao i3 / Monoprice Maker Select V2 fan replacement.

On the Monoprice Maker Select V2, the stock fan location blocks my view of the hot end. It's also a bit under-powered.

This design replaces the fan with a 50mm blower and moves it out of the way. It also doesn't require modification to the printer.

The fan duct is minimal to allow easy cleaning of the extruder nozzle. The outlet was kept small to increase the velocity of the air. It works well enough that I only run the