Just purchased a Transition Covert V2 off a friend. I primarly ride downhill so that's where most of my knowledge is. I don't know much about front deraileurs or AM type cassettes or gearing. I have a couple questions. To get the bike to where i'd like to have it, I'm going to be changing out some parts. First lets talk cassettes: what do you guys like to run? i was looking at the sram pg 990. Any good? Secondly lets talk cranksets: Im torn between two, the race face atlas AM cranks or the Shimano SLX cranks. I've heard great things about the slx cranks. Im planning on running a dual ring set up with bash in the front. Anyone have an experience with either of these cranksets? good? bad? Then i guess comes the issue of front deraileurs. Im not trying to spend tons of money switching things up. Thinking about upgrading to x9 all around and ditching the x7 or whatever is on there now (already have a rear deraileur and shifter, just need a front shifter and front deraileur). Any adivce on which front deraileur to get? Thanks for the help guys. Can't wait to get out and shred on her.