Do any of you have the 10.8V cordless Dremel? I'm wondering if it's powerful enough to cut stuck rusty bolts in hard to reach places. An example, I have a stuck rusty bolt on my exhaust that I need to cut but I don't have air tools and the only thing I can think of to get up in there with is a small hand dremel with a cut off wheel. I don't want to spend the $80 on one if it's not powerful enough to cut through a bolt. It would be nice to have a cordless but would I be better off getting a corded dremel? Is the corded powerful enough? Besides a hacksaw or a air cut off wheel what do you guys use to cut out rusted hard to reach bolts?