Sorry, this one just didn't work for me. For me at least, it was impossible to get groups with a before/after solution. Try sticking to just one way round. Also, there is no unique solution as onion and card can be switched.

I thought including crossovers was part of the exercise. Its my first two attempts at creating grids ever today, so maybe i misunderstand a finer point. I didn't think the before/after thing was that much of a stretch to be honest.

Just a couple of suggestions-I’ve definitely benefitted from input given by others here. Crossovers are good but a unique solution is essential. Imagine you’re looking at the grid for the first time - can you see a potential group? Not many popular grids use before and after links in the same group. After all, there are only 3 mins. Appreciate the challenge tho :-).

Rubbish