Managing assembler trash slots without bots?

[Monochrome]

I'm trying to use the new "set recipe" assembler mode, but I'm finding that the assembler often gets clogged up with items remaining in its output slots when the recipe changes.

E.g. an assembler was making red belts, then the storage has enough so the recipe changes, but the assembler often still has 2-4 yellow belts in there. The next recipe doesn't use yellow belts, so the assembler clogs up & stops working. Is there an easy way to stop the assembler from being over-filled, so it can't clog up and stop?

Having an inserter remove all of the outputs isn't a great solution as all of the unwanted items would need to be sorted & moved back into their own storage or supply lines. There could be many different types of unwanted item, so doing that sorting without bots is going to be painful.

[BaggyK]

Is there an easy way to stop the assembler from being over-filled, so it can't clog up and stop?

Having an inserter remove all of the outputs isn't a great solution as all of the unwanted items would need to be sorted & moved back into their own storage or supply lines. There could be many different types of unwanted item, so doing that sorting without bots is going to be painful.

I have successfully used an inserter. The output will consist of the required items, plus any unused ingredients. Allow any items that can be produced to be sorted back into there destination storage. Everything else insert into a single check that has a inserter back to the assembler.