Off hand tools still useful?

[Raldo]

Many many carpenters before me had grinded on Walnut Masks to get to 50. I assume several of them played around with stats and eyeballed that m.craft. seemed to be giving them better success rates.

For my particular case, however, the answer to your question is "someone told me so", so I'm afraid I can't provide you with any hard evidence. As far as that particular synth goes, it just seemed to be accepted knowledge.

It also seemed to fit in line that making mage gear generally uses m.craft. and melee gear uses craft (this may also be an assumption), since Masks generally have mage stats on them.