Got my new tank today and I love it
Never had a tank before and was a bit worried after reading about SO many issues with them (not M&P's just tanks in general) but this thing is working wonderfully - no leaking and super easy to fill. I saw the video on filling (very helpful for a newbie like me) but nothing on how to change the carto. Anybody have any advice on how you change the cartos? TIA 
