came back to new factorio, found your great and complex mod

My sorting facilities prodcues lots of pebbles, and the stiratite sorting gives me no copper nugget, which i would need to create of from nugget and pebbles. I understand this mod has advanced over time, but then I can't seem to find an updated flow chart for the recipies, and i guess there is some because of all these pebbles.... I'm not using Bob mods, nor any that should interfere with ressources.
Any info about the missing nugget ? and maybe a hint to an updated flowchart if one exists ?
Thanks a lot ! Keep it up, the mod is awesome
