Rustic Craft Mages (Mechanicals) craft with magic?

[Berengar]

You've seen this:

@HoH:S p.131

This object takes the normal amount of time to make (see City and Guild, Crafts), and always at least as long as a Ritual spell of the same level would take — generally speaking, the more durable the object, the more time it requires. During this time, the character must avoid distractions and maintain concentration whenever he is working on the object, just as if he was casting a spell, and like casting a spell the character can only work on a single object at a time.

You cannot replace your character's Craft with Finesse and speed it up by magic like in HoH:S p.60f Rego-crafting.

But you can negotiate with your troupe about magically made equipment to speed up your character's work, until crafting the object takes "as long as a Ritual spell of the same level would".

Cheers