Having a 196 tank built shortly....have the opportunity to place the withdraw tube and sending unit anywhere on the tank and was thinking of placing both at the very back/stearn center of tank maybe several inches forward of the stearn edge line. The old tank was not on the boat but am fairly sure the fill, vent, sending unit(if there ever was one) and withdraw tube were all located near the tanks center under the only existing 6" deck plate at the stearn edge of the center console(my fill and vent will be here as newer hose was installed to this point on the old tank and no sense replacing it).....Is there an advantage to placing the withdraw tube and sending unit at the very rear of the tank with the angle the 196 sits/rides in the water.... want good accuracy of the sending unit and withdraw at the low point in tank. Does anyone suggest venting the coffin box? If so, how? Thanks for your help!!!!!