I have a 3163 surface skimmer/filter and the 3155 sensor mounted on the back of it. The problem is that on my tank the wire from the top of the 3155 optical sensor is under the rim of the tank, so I can't raise the 3163 (and my water level) to where I would like for it to go. Other an moving the optical sensor off the back of the 3163 and mounting it to the tank side, is there a way to space the 3163 further off the tank wall? Thanks