2).  For half cylinder tank and Corner tank, the basic panels of LV half cylinder or LV corner stands are the same, except the panels at two sides are now similar to a triangle with outside being curvy, and the door is just one piece instead of two. The shortest screws are for the door magnet, and hinges (part of door hinges may already on, in which case you just snap the door on), the middle size screw (about 1 1/4") are for the feet, the longest screws are for fastening the top and bottom panels.

There are already holes and wood pins there for you to position the panels. If you see any combination letter T, it means "top", B= bottom, L=left when you facing the front of the tank/cabinet), R= right. 

Just use common sense, and I am sure you can do it.