my current request setup looks like this:

gather info from warehouses (ie. 50k).
send into arithmetic combinator which substracts the target request amount (ie. 50k - 30k -> 20k)
then i check with a decider if the amount is less then 0. if not i dont output anything.

this avoids your problem.

This looks very helpfull.
I hopefully will try it on the weekend.

Thank you

at least for me it is really hard to tell where all the wires directly around the station go. maybe they dont go into the input light and instead directly to the station entity or none of the provided (and requested) items reaches the treshhold. in any way it would help you a lot to always use a pow...

also not all you want but part of it:

https://mods.factorio.com/mods/judos/miniloader