Any Lode Kings I've been around when doing wheat I load 1 good pile over the gates on each compartment. The front and 4th good and high but below tarp loops, 2nd and 3rd maybe 10 to 12 inches below the top sill. I would be willing to bet this will get you close enough to get to a scale and check the weights. With canola, 2 piles in 1 and 4 and 1 pile in 2 and 3. With oats, pretty much full front trailer and from the back of back trailer, full but the last 4 feet or so. If it has the weight per axle decals in the airgauge boxes they are pretty accurate. Don't get advise from a Doepker guy because I find they load completely different, way more picky for balance. My truck I fill 1 to 55# on tractor, then 2 to 70# on tractor, don't worry about trailers yet. 4 to what looks the same as 1 or about 60# on tandem, then 3 to finish tridem at 68# and tandem at 78#.