Inside the LD03
The front panel of the LD03 removes quite easily. The panel is retained with plastic ball and socket style retention, but more angular. This allows them to slip out much easier with less harsh tugging needed. I will admit that the panel popped off in one of the motions of reattaching the top, so be cautious and know that it can be popped out if it's knocked a bit. One thing you will notice is the four (two on each side) circular pull clips. These are for releasing the two adjacent side glass panels.
Here we get a closer look at the pull clips which affix the side panels. Next to these, we also catch a glimpse of the HDD/SSD tray. Above the clips, you can see the slot where the front panel clips into and is retained by a friction fit.
Here is the LD03, with all three of the glass panels removed. You can see it actually can be quite easy to build in since you have a fully open front and sides to maneuver parts into the chassis and mount them.
Here we have a straight shot at the main chamber where we can see the motherboard tray. You will notice the left that we have the oblong hole, which is where the GPU will pass hot exhaust out of its bottom. The reason again why the gap is elongated vertically has to do with the fact that the board is rotated ninety degrees, and the I/O comes out of the top. Here you can also see the PSU fan hole, which is slightly cut off by the motherboard tray, which gives you an idea of the close proximity of the PSU fitment. The motherboard tray does not have but a few millimeters of space between it and the non-removable rear, so there's not a lot of room for cable management, which is expected in smaller ITX cases.
The bottom of the chassis shows the single fan mounting. The pre-installed 120mm fan here is just like its counterpart up top for exhaust. Both of these fans are DC, but motherboard DC control has gotten better, so that's not a deal-breaker. You also can see the elongated cutout found here, which allows a longer GPU to exceed the constraints of the chassis slightly, but if you want to keep your filter down there, it will only be a handful of millimetres.