If there's oil in the input pipe and room in all three output pipes it will produce, there shouldn't be anything else required. Check for breaks or blockages in your pipe network.

I think you just need two arithmetic combinators and a decider

Two arithmetic source from chest 3
Pu * 2 -> Pu
U * 1 -> U (just to block feedback of Pu count)

Then your decide takes from the output of both of those:
If Pu > U, output 1


Depending on what you're doing you might also find this ...

Compressed blue belt carries 40 items per second
https://wiki.factorio.com/Express_transport_belt

Train cargo wagon carries 40 stacks, and your ores are stacks of 50
https://wiki.factorio.com/index.php?title=Cargo_wagon

So a train with two wagons can keep a blue belt full if it returns every ...

I find one train per resource is plenty unless you're building a HUGE base. The important part is keeping it running.

I usually have a line of stack inserters and steel chests beside each train stop. So the cargo wagons unload in seconds into the chests, and then the chests take time to empty onto ...

What if you want to move fluids with logistics bots? Or a car? Or the player? Or belts? I've used all of those in the past...

Feels like it should be rebalanced though. A train car full of barrels is an insane amount of oil, and I expect any tanker car to hold significantly less. Which doesn't make ...

Yeah, it'd be nice to get some of these renamed, although I don't think any are really huge issues, and some I would argue definitely should not change.

So, having speed/efficiency/productivity "modules" is fine. The name describes exactly what they do, and the complaint against it is essentially ...

Now I'm thinking.... how about put those map-related mod settings into this UI, with the new tab "Mod settings"? I mean, some mod settings are prototype related, changing them require Factorio to restart. But the other settings can be changed for each map. I think it will be more user friendly to ...

Yeah, the scaling has some issues... I find some settings work better than others, so like 90% might not be readable but 88% might for example. I keep mine at 80% and don't have any issues, but YMMV I guess...

I do agree it would be nice if they tried to shrink it a bit so that isn't necessary ...

Yeah, the scaling has some issues... I find some settings work better than others, so like 90% might not be readable but 88% might for example. I keep mine at 80% and don't have any issues, but YMMV I guess...

I do agree it would be nice if they tried to shrink it a bit so that isn't necessary ...

In the game options menu there's a setting for UI scale. Reduce that a little and it should take care of that issue.

You have to make your own objectives!

For example, I'm a huge fan of the old Command and Conquer RTS games. If you look at rise games as "can I defeat a hard AI?" the game will be over in an hour, tops. If instead you take an objective of "can I beat this team on this difficulty on this map using ...

Hmmm. Looks to me like after these changes you'll need to put some work into making combat more challenging again. I think the best way to do that is to revamp the power or robot systems though. Either robots shouldn't build instantly (they're already weak enough that turret creep incurs noticable ...