I have a 2016 Trek Fuel Ex 5 which is currently a 2x10 from factory with Sram X5 shifters and sram Gx rear derailleur. I have taken the front derailleur off and put on a narrow wide 32t chainring up front. I just bought a sram Gx Xg 1150 cassette along with a new Sram Gx rear derailleur with clutch system for it to get and extra granny gear, need help with other components I may need along the way (shifters, etc.) and do I need an XD free hub I would also like to upgrade the points of contact as well ty for the help.