Tried both ways a few times, in case I was understanding the instructions wrong! I gave it another try a little while later (because I felt like I had to be able to do it lol) and was able to do it once, but I think it's just that the placement required more precision than I was expecting. More than just overlapping the yellow circles haha. Not sure which collision box I was missing? but clearly one of them. Anyway, I hope that's helpful if you keep working on it. This is a really cool project! :)