Automotive peeps, do I really need both of these? I'm thinking of just asking for a butterfly impact wrench for Christmas to use for pretty much everything. I know it'd work for removing the big bolts on that transmission I just did (b/c I've seen one used for exactly that application) and of course it'd work for lug nuts. Do I really need an air rachet too? The nice air rachets aren't cheap and I don't want to ask for one of those unless it's something I'd really need.