Hi there
To set trunk slots, you currently have to set an adjacent Constant Combinator to T, then X times the signal you want to filter, i.e. Iron gear wheel =1, 1, 1.

If you do this on a circuit system (for instance if you have a system that tells the circuit network "I want 400 iron gear wheels") this will only set one stack - changing the numbers does not work, and obviously sending iron gear wheel = 1 to the circuit network 3 times resolves as iron gear wheel = 3.

Is there a way to set the filtered trunk slots from a single signal? This could resolve a couple of ways, i.e. "iron plate = 3" = three filtered slots, or "iron plate = 200" = 2 filtered slots, "iron plate = 250" = 3 filtered slots (rounding up stacks).