I'd sure have at least two extra strong straps, one holding the tractor back from forward motion, and one
holding it upright. Then supplement with other straps.
Having owned a larger boat, I am used to the "spring line" approach, two lines on each side, one going forward, one
going in reverse. Then a strong one to the rear, and another strong line in the middle. Isn't likely you can accelerate fast enough
to flip your tractors off going backwards...
Actually I think I have the same straps on my trailer, the larger size retractables? they are great for machinery and maybe "her" tractor but
yours needs a stronger strap on the axle or off the drawbar. Easy to add. Never can have enough straps.
they make heavy duty axle straps that can be modified into nice tie down straps btw.
Very nice looking trailer, I bet you picked up another five hundred pounds of capacity.