@dferguson10 Oooohh that makes a lot of sense. So by having them in a line the forward most ball gets the majority of the force and hits the top flag thank you so much!
Yes. We do that in juggling. Say, when you're juggling four balls in an oval pattern (shower), the math is 7,1 for the heights (really the times in the air measured in beats). You can collect two balls stacked in one hand and toss them together, and their heights end up with the upper one at 7 and the lower one at 5, meaning it comes back a moment earlier, right where you left the gap. The point is that the lower ball gets 5/7 of the speed of the upper ball in that toss, while it's all one action.
In practice with the puncher this works because the two balls are not connected and so can bounce a tiny bit off each other, and because all the collisions are not perfectly elastic. Meanwhile the puncher is still there when the front ball is trying to virtually stop the back ball, ensuring the back ball gets launched, too. I expect tuning it took some effort.