Just checked mine. It's gona take time for me as well. It looks like the spline on the steering wheel is aluminum. I am betting there is some pretty good corrosion in between the steel and aluminum. Some tapping and with a weeks worth of patients I hope mine breaks free. I really don't want to put a puller on it because I would probably break the back part of the steering wheel. Will let you know what I have luck with.
Tim
Tim