boy that is the truth you just do not want to admit you can't do it so you keep trying knowing you will get for sure the next change.
One hint I had to create some with long scorpion like tails that when the center of gravity flipped on the contraption it flung that long tail out and into the goal box, but you have to put the boxy part of the contraption on or near that extension part because it is that boxy part that has to enter the goal area.