dremel will do the job but you will go through a coiuple of wheels. I would use 4 inch angle grinder and go slow about it, to keep from grinding on the case. I would also remove those bolts around it first.

I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago. Edgar Allan Poe