I am looking at upgrading and going with a full SRAM GX setup for my 2011 Niner EMD 9, but don't have the money to go 11 speed. So, I was thinking of getting the GX front crankset, gx short cage 10 speed rear derailleur, 11-36 cassette. Are there any special considerations I need to make? Should I use the 11 speed chain because of the crankset? Do I need to get a new Bottom Bracket or should my existing one work?