tinker gnome + minor conjuration... what would u allow?

[Joe dirt]

i am creating a tinker gnome for new game i am in and going to take the conjuration school as my specialty granting me the minor conjuration school specialty to make objects.... would you allow people to use the characters "artificers lore" ability to "see" an object that some tinker gnome or dwarf created in the far past? like for example a flame thrower powered by alcohol (alcohol must be bought) that does cantrip level damage with a possibility of exploding? would you allow any successful craft proficiency checks to "see" an object never actually seen before? would you even allow it to make like for example the music box, fire starter, or clockwork toy in the players handbook on the fly?

[TheTeaMustFlow]

As long as they don't use it to create anything hugely powerful, (i.e. no antimatter guns or briefcase nukes) I'd have no real problem with it.