The tri for this week I made in layers as far as I recall. The triangular bottom section I worked in diagonals, then added the two flanking triangles. The next layer up, I worked the triangle in three layers, joined them and added the side triangles as before. The top two layers are easy.
L1, I don't think any of you will have any problems with this one.
L 3, I found paper piecing this straightforward, it went together well for me. I haven't mentioned it recently, but I made all my outside peices a little oversized, and trimmed when each block was done
L11, Not dissimilar to L3 in a way. If any of you are working from the book rather than the software, I don't think the diagram (pattern) in the book is correct, but it only needs tweaking with some extra straight lines. I'm sorry, my block (shown top left) is not this one, it's another I moved around. I do apologise.