Controller Box for Desktop Fan

Hi, now that's the Summer is nocking the door, i decide to print my self a simple desktop fan. Why buy one when you can make one from the scrap? The Parts: - 80mm CPU Case Fan (get it from scrap) - The Base for the Fan (https://www.thingiverse.com/thing:2190277) - A Fan plate you can use any design, i choose this one (https://www.thingiverse.com/thing:757895) - For the power any 12v1amp PSU. - 1x Transistor C3306 - 1x 100k Pot (the one with switch included) - 1x 5.5 x 2.5mm DC Power Jack Plug Socket Female - 1x Pot Knob - Some cheap set of M screws, used the ones from a cheap box from a one dollar store. - Crazy Glue (for the box lid) PSU i used (https://www.ebay.com/itm/USB-DC-5V-to-DC-12V-Step-up-Module-Converter-2-1x5-5mm-Male-Connector-Plus-MF/222719676428?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649) In order to solder it you can have a good idea of it watching this video (is not mine): (https://www.youtube.com/watch?v=SeExkT0NlRw&t=3s)