Here's a little progress. I'm not happy with the woven stitches (tree branch). The directions say to stitch them with 2 strands of thread, but it was bulky and came out rather sloppy. I may frog them (again!!) and try it with just 1 strand. It'll lose some of the texture Martina was no doubt shooting for, but it'll look better overall.
Here is close up of the border: