Getting a red error on load with the mod enabled. Have a lot of other mods, gearing up for my first 1.1 w/ royalty game. Haven't used this mod before and seemed handy. Error message give you any thoughts?

Could not resolve cross-reference: No RimWorld.StatDef named SmithingSpeed found to give to Verse.RecipeDef MakeFirefoamGrenades
Verse.Log:Error(String, Boolean)
Verse.WantedRefForObject:TryResolve(FailMode)
Verse.<>c__DisplayClass14_1:<ResolveAllWantedCrossReferences>b__0(WantedRef)
Verse.<>c__DisplayClass6_1`1:<ParallelForEach>b__0(Object)
System.Threading.QueueUserWorkItemCallback:WaitCallback_Context(Object)
System.Threading.ExecutionContext:RunInternal(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.ExecutionContext:Run(ExecutionContext, ContextCallback, Object, Boolean)
System.Threading.QueueUserWorkItemCallback:System.Threading.IThreadPoolWorkItem.ExecuteWorkItem()
System.Threading.ThreadPoolWorkQueue:Dispatch()
System.Threading._ThreadPoolWaitCallback:PerformWaitCallback()

This mod is giving me a base definition error in the Debug Log.

- RimWorld v1.1.2579
- Firefoam Grenades v1.3.1.4
If you edit "v1.1_Weapons_Grenades.xml" and remove the section that modifies "BaseGrenadeProjectile" the error goes away.