Build a ramp on the side of the platform saddle and park an anky on the edge of the ramp. Fly to your favorite metal node farming spot with your tribe and let them just swing away. The anky's weight doesn't affect the quetz's weight.
The fun way is to jump off and grapple to your argie and whistle it to attack and since argies are slow it won’t catch up in time so tranq till it goes out also bring parachutes and consider liking so more people will know
If you drop a quetzal due to knockout, and it lands next to a giga...just know, the quetzal belong to the giga. Now you get to watch your would be quetzal get eaten by a giga. Now you can go home and cry.