So I have a bunton hydro 48" that is a backup that stays at the house under a carport. Problem is now I need to use it and I took the blades off to get new hi-lift blades put on and I can't get the center bolt with the two spacers off of the shaft in order to get the blade off. Im half tempted to buy new shaft/bolts and spacers and end this battle. I have spent the past 3 hours with these blades in the vise beating them & heating them then beating them some more trying to get them off the shaft they are seized on there something aweful. What do you guys suggest trying? I have went through half a bottle of PB blaster.