I don't have an air compressor, no money in the budget to buy one and no friendly neighbors with one either. Several times I've wished I had an impact wrench to loosen something that some gorilla tightened beyond all sanity (probably me). Are there decent electric impact wrenches available? Do they work well enough to justify their cost? I'm not talking about the $29 model at the discount store, but has anyone used a Milwaukee, or Porter Cable or other premium brand electric impact and have it work at least close to what an air wrench will do? Thanks for any input on this.