redoing my cuda right now, took several tries, and jacked my back slightly, getting old sucks, but thats not stopping me,,,, yet!
The bottom of the frame is a 5/16" +/- steel rod that is tied off in multiple directions which gives it its ridgidity and subsequently what you must overcome to get it out of the hooks...
If you don't get it this week, when I go to the shop next week end I can get you a pic of the underside of the seat...
Good luck!
Also remember it's the bottom part of the seat that really needs to be pushed back, pushing on the top is easy but thats not what is hooked.