On another note: What about enchanted devices that take raw materials and use Rego+Form to make things, is there a way to make things beyond the basic capability?
(From City and Guild)
Those items use the wielder's finesse. You could make the item from a suitably attuned tool of virtue. If you are prepared to make an invested device you could include a CrMe effect that acts as an excellent example product, an InFo to detect flawed work, another to assess raw materials and a MuMe to improve the wielders base stat.
And how does that work again? 