I just finished up the mATX build with a fully aluminum case :) Why V3? It's already the third version of a small type case I build for myself; previously, I have owned Lian Li PCQ 08 and Lian Li PC-TU 200B.
UPDATE 01/31/20: - Changed Noctua NH U9S cooler to Be Quiet Dark Rock TF, now temps are good with no downclock. - Top case fans removed. - Modified case legs to legs with a little bit higher height and black color.