Thanks for the replies. I guess the safest for the tractor (Kubota B2910) would be to just load the trailer with weight on the tongue. I actually have a set of those adjustable bars from an old Ford, but I don't like the thought of what might happen if I lock up the 3 point and then accidentally hit the lift lever...This tractor has position control only, so the draft control idea won't work... What about a mechanical limiter, like a hinge that folds out, to stop the lift lever from going any higher? I actually already put one on the 4 WD lever to keep it from accidentally slipping down into 2WD, as this happened to me once with scary consequences... But I will try the chain idea. Thanks all.