Is there away to assign equipment to a task as a resource, without it changing the duration or work hours? For example if a resource "bob" is working on a task, and he needs "welder 1" for the whole task. I've tried doing it a couple ways, and it always messes up my hours and duration. Prjoect wants to assign the welder in a way that it is actually doing work. Is there any other way to do this?