[EricH]

Originally Posted by EricH

Think I might take a few minutes in the next couple of days to monkey around with the prototype I posted earlier to make it more secure/a little stronger. I might try combining the two good designs, too.

Done. 4 engineering textbooks with only minor bending. On cardboard.

Technical details: double layer of cardboard on the bottom, held together with duct tape and packing tape. The wire that's visible is meant to represent a robot-based pin release. I made sure that all the books were off the support chairs for the test--I'd estimate about 20-30lbs.