The plan is to crack all the light oil in petroleum, maybe a second refinery is needed... I am testing it and the petroleum comes a litle bit slow, we'll see. The bigger problem are the bugged underground belts wich get stuck all the time...

Nope, the size is not important since there is no use of robots at all. I just realized the size when I build a roboport next to for deconstructing.

Prototype is done, but untested. It sould produce 0,75 flasks per second (T1 to T4). All seems to fit in the 50x50 area of a roboport. To have the full one flask per second, you need tier 3 factories and 4 tier 2 productivity upgrades in the fatories for T4 flasks.

I am currently working on the T3 flask production wich is a BIT more complex. Goal is a factory wich produce 1 Flask per second of T1 to T3 without roboters. BTW: there is so much need of a possibility to choose the side of the belt for the inserters. Also fast and/or smart long arm inserters.

This setup should be able to produce one red and one green flask each 2 seconds with tier 1 factories, each 1.5 seconds with tier 2 and 1 per seond with tier 3. The limiting factor then are the inserters, so productivity modules can be used to further push the output.

Same here, with tier 2. Works for several minutes after removing the stuck items, then got stuck again.