Haha, I just tried sliding it forward on mine and it came off really easily, almost too easily. From all these posts I was ready for a struggle, so I started pushing pretty hard, and it just popped out with a loud sound and kind of startled me. Anyway, that makes my mods a lot easier. Thanks for posting everyone. Also, I plan on using a 50 watt submersible heater, I think 50 should be plenty...