yeah tryed heat on it. will try rapid cooling next week when i get back to that job. ive had the puller wound in really tight and then had a brass rod on it an hit with a big hammer but it doesnt want to move yet. left the puller on overnight thinking it may pop off its self but no not yet. i think more heat will be needed although ive already used the oxy on it to quickly heat the center, but i reckon rapid cooling might work.