Here's a tip to improve your PP. Try basting the sub-units together first
using the longest stitch on your machine. Then check if they match.
If they don't, remove the stitches and try again.
Once you are happy, then sew with small stitches.

Sincerest thanks to each of you for your thoughts and suggestions. Very helpful! I think I'm going to try one block pieced the standard way and one block paper pieced in 3 sections, see what I'm better at.

Good Luck ....... and let us know how you make out!

I tried making a PP using EQ and realized once I started sewing them together that I had to split the design and then sew the sections together. Made it much easier. Your pattern looks to be similar to what I had to do. The top 3 triangles should be 1 section and each side 3 triangles should each be separated put together and then you can sew each section to the large triangle. Accuracy is the key to PP in my opinion.

Some paper piecing requires several "chunks" of the design to be sewn in separate sections. This is just because of the design detail. I love making Carol Doak's PP patterns and all of them demand that you make each block in sections and put the sections together to get the perfect block. So what I am saying is do not be alarmed with this kind of design detail. I would trust EQ8 to give you the right layout for a block even with a lot of triangles.

This is how I see it: A1 is your first piece. Add A3. Then add A2, A4 and A5. Stop at this point. Side triangles are pieced: A6 to A9, then add A10 and A8. Sew to the A1,2,3,4,5 piece. Repeat with other side: A7 and A12, then A13 and A11. Sew to other side of A 1,2,3,4,5. This completes the block.

Hope this helps.