So on my 2012 Marin Palisades Trail my bottom bracket just sounds like death. According to bikepedia it's a Truvativ Powerspline. I would like to change it myself and this would be my first time doing it. Obviously whatever new bottom bracket I get needs to have a spline to run the same cranks, right? In your opinion what tool should I purchase? Anything else you think I should know? Thanks.