Do skill levels affect the quality of what you make, or just the chance of making it?
Your skill level is currently the only thing that affects crafting quality.
Iron/steel anvils are supposed to increase the quality of crafted items as well but after many many many tests its been proven to have 0 effect.
Quality and type of your tool is also supposed to effects the outcome of a craft but is also not working as well.
Devs have been made aware of this already just waitin on a fix? As they said that anvils and tool type/quality should effect quality of crafted items.
Tool quality you need to craft - effects overall result quality. However that range is 2 big. I agree it's not normal to get 90-150 range in 10 tryes.
Tool quality does not effect overall results period. This was tested extensively on over 200 crafts using 70% hammer and 130% hammers. The avg quality from the 70% hammer was 101% the avg quality on a 130% hammer was 102%.
Only thing that effects the outcome is your skill level.