I was able to find a solution from the forum for getting access to the inner exhaust nuts on the left side of the engine. It seems that a flex socket is required. I have read that it should be a 1/4" drive. Is this mandatory because the 1/4" drive is smaller? I am having problems finding them locally but I have found 3/8" drive. Should I save my cash and keep looking or will the 3/8" drive work too? I don't want to buy twice. Thanks.