Hi.. I've, maybe, found a problem with bookbinder. At level 3 for the Manuscript the bookbinder said that it would take 20h in order to finish. When you upgrade to level 4 it will reduce time of 33%. Now, mathematically 20h-33%=13.4h => 13h but the bookbinder say 15h. Why? O.o I didn't controlled the others books but i think that the problem it's the same.