Trailer not level towing

[Crows Nest]

Towing our new 21NE. Hitch ball was setup at 19” per ETI specs. Using E2 WDH. Top of hitch is at only 16” when hooked up. There is probably 40-50 pounds of stuff in the front storage plus two full propane tanks. Nothing under the front dinette. When picking up trailer ETI suggested I might need a heavier WDH. U don’t recall which one I have but what are other people using? Or should I raise the ball height? Thanks