Losing cubes and contact area

Hi everyone. I had a competition yesterday and I noticed that when driving, a lot of cubes fell out of the upper part of my tray. Also, I was wondering what part of the cube is best to contact for being able to intake it at all angles. My robot contacts it at the upper corner of the cube, which doesnt seem optimal. If anyone had had this experience or knows a possible solution, that would be appreciated!

I believe the best contact point is the upper corner but it has to be fast enough to spin the cube about 15* in order to sit in the stacking tray correctly

for the losing cubes. add lexan to the sides so they don’t fall out or just add more materials on the side. Or don’t drive so violently. most trays loose cubes in the upper portion and those will fix it.

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