It works fine for Weaponsmiths. 12 items to make (now let's not get into why we apparently have to do the double amount for one writ and probably get the same total bonus in the end than another class for 6 items? Yield is about 0.3 bars excluding any benefits such as potions or vitality, could be a bit higher in my opinion for 12 items) and I get back the 60g for the fuel.
Sha