Hi All, I just bought a new 2021 HQ-12, towing with a Tundra Crewmax, 4x4, 5.7L with Fox 2.5 adjustable coil-overs, lifted maybe 3 inches. Extremely pleased so far after our first weekend out. I noticed that when the tanks are 100% full (freshwater and drinking water) the tow was perfect, I...