i am adding another track to my layout and i am not sure of something . To go over my exsiting track i want to use a cross piece of track is this poss. I plan on using two different power packs for each track, now by using this cross section track will it mess up my power to either of my track layouts. or what else can i use besides going over or under my exsisting track. or is there a way??? Please and thank you very much...??