Size of upgraded liquid storage tanks (should be diameter 8)

The current 5x5 storage tank setup doesn't allow near perfect hexagonal tiling. The upgraded storage tanks could be bigger and allow for better hexagonal tiling and also be a sensible size.
The new tanks grid width/height should be an even number to allow for all connections to be made when tiling. Since we are working with integers we want to find a size where 2 times the apothem is very close to an integer when calculated using the circumcircle radius of the hexagon.
Fortunately we don't have to go very far as a diameter 8 tank with a standard collision for a pixelated diameter 8 pixel circle gives a 2xApothem of 6.93. This will allow for near perfect hexagonal tiling with all connections being made with no need for intermediate piping.
Also, since the volume of a tank scales by the cube of it's radius the current tank has a radius of 2.5 for a volume of 15.625 units and the larger radius 4 (diameter 8) tank would have a storage of 64 which is 4 times more storage.

I know the current tech stores 180 and the upgrade states it will be 360 but perhaps you can push the level 2 storage further up the tech tree (since 4x is a lot for than 2x) or even have a level 3 storage. Or you could just make it an 8 diameter tank that only stores 360. Hexagons!
Or maybe since it takes up more space and you can make it more material expensive with construction parts 3 the 4x storage would make sense. It would take up 64 squares vs the current 25. So 4x storage for 2x land space with more expensive construction :)

I love seeing this kind of suggestion. It's not something you would think of but every player will run into this, whether the notice it or not.

and visually if you look at photos of refinery's they have tend to have several different shaped tanks, this would improve to the overall look. IMO