I just got a Lionel LW transformer to power most of my accessories. I use a couple of CW-80's to run the two-train layout and, up til now, the accessories. The grounds are tied together so I can use an outside rail to return train and accessory power. If possible, I would like add the common/return of the LW to the mix. I would like to know if this is doable and whether or not it will be necessary to phase the LW to the CW-80's.