Unlike other Native American tribes, the Calusa didnt farm instead, they fished and ate shellfish
There are usually two adjustment points on each side of the strap: one on the lower half that makes the strap looser or more snug against your jaw and one to adjust how the top, V-shaped section of the strap fits around your ears (which we'll get to later)
Thats over 800 pounds of load, which it carried without even noticing since its actual payload capacity is actually 1.5 metric tons, or 3,300 pounds
For added compliance, we would suggest experimenting with the pressure of the 20 x 2.15 Schwalbe Pick-Up tires, which should offer plenty of leeway
Add wind into the equation, and it's very tough to keep all slack out of the line