THE 303 INTERIOR

 Thanks to the lack of front drive cages the interior of the 303 is actually quite spacious (the vertical area near the center is for the graphics card holder while the one on the far right is for tube reservoirs).

To make up for that IN WIN has placed two vertical 2.5" trays made out of aluminum and held in place via thumbscrews.

IN WIN hasn't placed any front fan mounts either and instead they've placed three 120mm ones at the base of the 303 (if you don't install an E-ATX/ATX mainboard you can place a 360mm radiator with fans there).

The expansion slots are held in place with regular screws (that surprised us since IN WIN markets the 303 as a tool-less design tower).

In front of this hexagonal mesh you can install yet another 360mm radiator (or three 120mm fans) which will use the air coming from the base (and in turn will send it out the perforated area on the right side panel).

The mainboard tray has a total of 5 holes which can be used for cable management (unfortunately none is rubber dressed).

On the other side of the hexagonal mesh you can install a power supply unit up to 200mm in length.

IN WIN has also placed two extra trays on the other side of the mainboard tray, this time however these are ment for both 2.5" and 3.5" drives (also held in place with thumbscrews).

There's a good amount of space between the mainboard tray and the right side panel so routing cables shouldn't be hard.