My cylinder Barrel is stuck, and nothing I've tried seems to be working. I have triple checked that all 8 base bolts are unscrewed. I have been hitting it with a 16oz rubber mallet for the better part of an hour (off and on) I've tried heating the base with a torch. And ive got a steady flow of PB Blaster going on the seal. The pistons are not seized. Any tips other than keep swinging, heating, and spraying?