As long as you get the important parts down. The style of the tip of the head on a screwdriver, for example.

[And really, as long as he sees the arm, he can figure out what tools might be needed from there. A bit like seeing half a puzzle and trying to recreate the missing pieces, but not impossible. Plus, he likes the little bit of challenge it would provide.]

Fine by me. Just run whatever tests you want with it out of my forge.

[And maybe he can watch, with a pen and notepad.]