I picked up an IRD cartridge bottom bracket and their Swiss thread cups to use on my low end Batavus project. Supposedly you're supposed to be able to just pull the English thread cups off and swap them. The non-drive side was a little stubborn but I was able to pull it off by hand. The drive side is a different story with the cup not wanting to budge at all. Looking for any ideas to get it off. I really don't want to tear it up that much trying to get it off.