i never see a CM Elite 333 before, but i guess its inner part is same like other normal atx case rite? so no need to detach the mobo tray, let it just attached to rear part, and just flip it to the left (this will change ur psu part to be below in ur ur casing)

opssss, ni nak citer psl cable management ke psl nak tukar jd btx?

syg la bro to scarifice this case for btx project, me only use 'very' chapalang casing to do this moding (btx style mode), even the case i got near the garbage bin (thrown away by my friend )

i notice it just now, TS have to change direction of the cooler for better result