Dunno if this is known by you, TheGreatJ, yet, but I think JPipes needs an update after today's Forced Update. Here's what I get when trying to compile it:
Error while compiling: JPipes.cs(1979,148): error CS1061: Type `ItemContainer' does not contain a definition for `CanTake' and no extension method `CanTake' of type `ItemContainer' could be found. Are you missing an assembly reference?