I would do that, but newer models and textures do not work at all in 586, so if I'm making a map that uses them at all, I'm stuck using 620. I would not be using 620 if I didn't have to, since 586 has worked fine for me since 2008.
I'm not sure about that, i tried with newer models specially those new prontera it works fine with me.
And also FYI: 586 was 01-Jun-2010
Not 2008 if your mentioning 2008 that was 490+ something unless if your Borf you have that tool since 2008.