I believe RedCowboy has removed the ball lens by just prying it off against the module you pressed it into. He just pried against the top of the module and the can pops off. The problems with decanning have been related to blue diodes. Not so much with green.
I press the diode with the Gball intact into a module. Then use a small flat head screw driver and lever between the rim of the Gball casing and the inside of the module. This means you pull towards the centre of the lens ie pivot on edge of Gball casing. Do this gently and move around the lens applying force on different points. It will take 4 - 5 attempts before you will hear a cracking sound. As soon as it gives, stop and remove the screwdriver. Use a pair of tweezers to remover the lens, or just tip it out.
I used to use the vice method shown by Angelos, but this almost always destroyed the Gball and I often had marks on the diode from the press (you have to hold it very firmly). With the above method not one diode has been damaged and all Gballs came off intact.
If you want the Angelos method let me know and Ill hunt it out for you.