If you dont do something about the (weld bead) on the inside bottom of your bumper square tube,you will have a leaking sewer hose. I dont care if it is a (Rino,WineO,or Valtera) the weld will cut it No Warr.coverage! I lined mine with Vin-soffet mat. On the tank covers make sure the top Lid Hinge is towards the front. Just saying,your choice.
Youroo!!