Nick Meyer (center) launches a T-shirt into the home crowd during halftime of the Marion boys? varsity game against Bennington Friday as eighth-grader Jarret McLinden (left) and instructor Don Molleker (right) assist. The four members of Molleker?s Engineering Comprehensive class?Meyer, Tyler Neufeld, Luke Steele and Austin Sumner?designed, built and tested the T-shirt shooter over the course of about four weeks. ?It didn?t work the first time we built it,? Molleker said. ?We had to make changes. That?s part of the class. You design something, you test it, and if it doesn?t work, you redesign.? The students tested the T-shirt shooter?on which the second two letters were intentionally printed upside down?for accuracy and distance prior to Friday?s game. ?I wanted to make sure everything was safe that we could think of and run through a few shirts to make sure everything was working like it was supposed to,? Molleker said. Overall, Molleker was pleased with the result. ?We couldn?t really up the velocity of the projectiles because we didn?t want anybody to get hurt, but I thought it went very well.?