clarify weapon crafting rules

systems.tex

@@ -39,15 +39,16 @@ However, each boon increases the \gls{tn} by 1.
 
 A poison might inflict 4 \glspl{ep} each \gls{interval}, for 3 \glspl{interval}, and require a \roll{Wits}{Vigilance} roll at \tn[10] but this would raise the \gls{tn} from 7 to 14.
 
-\makeRule{sword_crafting}{Crafting a sword}{Strength}{Crafts}{13}
+\makeRule{sword_crafting}{Crafting a sword}{Strength}{Crafts}{15}
 
 This requires equipment, such as moulds, and a long night.
 It also requires a single level of the Combat Skill.
 
 A tie could indicate a completed sword, with a shattered mould.
 
-\makeRule{make_mould}{Creating a weapon mould}{Intelligence}{Crafts}{10}
-Anything with a cost of less than 10 \gls{cp} can be fashioned in less than a day, with only basic woodworking tools.
+\makeRule{make_mould}{Creating a weapon mould}{Intelligence}{Crafts}{11}
+A weapon mould grants a +2 Bonus to weapon-crafting rolls.
+Most metallurgists cannot form weapons without one.
 
 \makeRule{make_armour}{Creating silent plate armour}{Intelligence}{Crafts}{16}
 Creating silent plate requires planning from the outset -- existing armour cannot be properly modified.