I'm looking to resurrecting Emily's xx4 for her to use, I have a nearly new carbon we chassis and a similar carbon chassis without slots for the cells. I am buying some saddle lipos. Which chassis to use? Also bought some vla rear arms and hub carriers. What effect using these instead of we ones. Also what battery straps to use or buy. What about weight to even out using lipo. Is there a post anywhere about the above or can you answer.