After reading the thread i got kinda mix between the ideas of BeCurieUs an Solyx:

1. Resource gathering

I quite like the idea of BeCurieUs where you mine the uranium powder with acid which makes uran mining outposts little more interesting cause you need to bring the acid.

2. Resource refinement ...

Ah sry forgot Passiv Provider != Storage

Nice Idea.

But i had two issues while testing the mod yesterday.

Fist i had an Problem where the gui told me Belt aren´t valid items, so i changed

function is_item_valid(entity)

return (game.entityprototypes[entity]
and game.entityprototypes[entity].hasflag("placeable-player")
and game ...