THIS is the correct answer. Get a cheap 5/8 wrench, use a vise, and heat the beans out of it with a propane torch. Put it in the vise, keep heating it, and you should be able to bend the wrench. You may need to encourage it with a hammer I've bent LOTS of wrenches over the years
On the PM starters (magnum) you can get in there with a socket and extension.
