I modded a stock TT900 Supertower to add a 2.5" hub containing 2x USB-C + 2x USB3 ports by dremeling out an opening in the metal ventilation panel on the left side. I also used one of the spare fan mounting cages from the vertical side panels to build a custom 420mm cooling rack, utilizing 3x Corsair AF 140mm fans and a Corsair H115i Pro AIO cooler. With so many fans (11), I opted to use a TT digital fan hub controller & several 3-to-1 adapter cables to connect them all. The paint job was done with Krylon Hi-temperature Automotive semi-gloss paint. Note that the top of the bolts that hold the glass panels in place are red while the sides remain the stock black color.