I know how; just can't get it off.They 'Pop' out and in. Just push the spool from the spindle by using the thumbs through the frame from the back side of frame.
True, on my spey reel it's mostly switching out heads and tips.Like Ard said Mike, push hard. I bought one from Ard for my 2 hander and it was very difficult to push off. I think part of it is getting my thumbs into the openings. I do think it comes off easier after the first couple times. It's not a big deal for me , really how many times do you swap a spool with a 2 hander anyway.