Spool terrain: Storage tank

Simple pieces to turn a standard 200mm diameter spool into a scifi storage tank for 28mm/32mm miniature gaming such as 40k, Necromunda, Infinity, Judge Dredd, Stargrave, Star Wars Legion or Five Parsecs from Home. Just print and glue in place. You can stack up several spools if you want to create massive structures, just pop the roof on top. If you don't have an empty spool, the pieces should work without it as well.

I added fairly minimal detailing so it's easy to customize yet not too boring as-is. Note that there is no door (only a hatch on the top) in the wall pieces, as I intend to expand the range. This is a very generic wall section that should work not only as a storage tank but as the second or third storey of a bunker, prison or something similar.

As the remix function doesn't seem to work, I used the following for the details:

[Industrial Hatch Counters (Version 2)](https://www.thingiverse.com/thing:4335096) by [dutchmogul](https://www.thingiverse.com/dutchmogul/de