Very good finish design, well thought out to maximize cooling and minimize HDD vibrations, the rack 3 "is fixed to 1/2 Bay plates 5" 1/2 with a shock absorber system. The door presses more than enough to get a HDD "cornering" the BIOS sees the same rack without HDD installed, allowing to spend in Hot plug mode under BIOS. Good product for the price! No need to force as it happens often to slide in a slot 5 "1/4, perfect fit.