4 Quality Tier 1 modules now give you a full +100% Quality chance. But also +900% Crafting Cost.
Large total conversion mods.
Furnaces, assembling machines, production chains.
Normal -> Uncommon is pretty obvious, but what's less obvious (to my two brain cells) is the jump from Uncommon -> Rare
If I have:
%97.5 Normal -> Uncommon %97.5 Uncommon-> Rare
What are the chances of Normal -> Rare?
That depends on your "Quality Skip chance" setting, if it is 0.01 then Normal -> Rare is 0.975 * 0.01 = 0.00975, e.g. ~1%.