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Correct. However, they will not be mixed (which doesn't matter if the output type is all the same) and if the outputs aren't fully used, it will draw also the imputs differently. Hence, I suggest to balance the input side of the setup, i.e. between the ore station and the smelter.

i tested it. Removing of 2 furnace is to much as the third last one does never runs full then (and i assume it is not 100% hit by coincidence). But with removing the last one and setting an extra beacon with two speed modules, the second last one runs full. I will go with this but i will not publish a blueprint as it is just a small improvement to yours and you may want to update yours.

To advertise myself:

The Smelter

Pictures and throughput informations are provided. I have to admit i was inspired to create this by this post

The factory must grow...

I think I'll make a refence here to the continuation of this conversation.
There are ready-to-go designs for compressed 4 blue belts of plates and compressed blue belt of steel in this topic:
viewtopic.php?p=541574

Inspired by this topic, so it should be mentioned probably.