Could also be that you have your mounting position wrong. The Custom X is a directional board so make sure that you did not move your bindings up in attempt to center your stance for equal nose and tail length.
That is a major no-no and I see a lot of people doing that on directional boards.
Also, I am positive that you do not need to tune your edges on a brand new board. That is not the issue. You need to keep in mind that this is an aggressive board meant for advanced riders. Might need to get used to it.