creeping_death

Hi all,

I own 2007 535i LCI AT. Found a lot of information across various forums about sport button addition and SAT retrofit. But still have some questions:

1) What is the result of adding only sport button - heavier steering? What about throttle response? Does it really change?
2) Do I need SAT retrofit and SAT functionality coding in addition to sport button?
3) It it possible to code SAT functionality without retrofitting gear selector and adding paddle shifters? I'm not a big fan of paddle shifters

thanks.