I have done this 2 different ways, depending on the resources (soulstones) I have. If I have soulstones then it becomes easy...if not, then I put the 100 tinkering on a different char. The tinker being on a diff char made the most sense to me, he can make the tools, and jewls in advance and keep them in a bag for the imbuer/craftsman to use..also, you dont have to have the 100 arms lore on the tinker char as all he will be making is the jewls and tools.