I recently purchased a 2017 Edge 351. I didn't receive half of the manuals for equipment in the unit and Nobody that I have spoke to from dealer or Heartland can tell me how many gallons the #1 and #2 black and grey tanks hold. Online specs only show one hold tank each but I have 2 discharges. Can someone help me out on this issue. All manuals found online and jump drive given are 2015.