Thank You for the quick response.
As for method of I/O, yes, Bob's inserter thing, altho it works excellent, is very clunky config wise and user friendliness is the only issue there. Idea would be to repurpose rotate key to cycle trough 4 different modes for every output (belt in/out, pipe in/out) on every edge tile since in that case, rotation looses its purpose. Can be any other key aswell. Also, if You use the actual Bob's method it could work for You since we are going to configure every factory once or twice, not all the time like in a spaghetty inserter mess like i usually find myself in with Bob's stuff... Any solution would work, so i'd say whatever you can code in that is more robust.
As for modded loaders, i don't know if there are 1-block-sized ones since if i place the ones i have (2 tiles) and 1 underground belt (1 tile), it's 3 total and that is just outside beacon range.
I did use that for copper wire since it's 2 for 1 and output when half beaconed is just insane, saturated a full output blue belt side of the factory, was fun to watch as i made over 100K green circuits in a cycle ("based" one factory for manual crafting before automation... it lasted way into gold science :D)