Berlin Embroidery Designs – Tanja Berlin
Your satin stitches are a good angle and nice and close together, you went a bit short with your stitches to the left of the first stitch, I have circled where. Make sure that you bring the stitches down onto the design line otherwise the area might get bit narrow. You can leave this area, but stay on the design line for the rest of the section.
I do not recommend using thread heaven or beeswax to coat the thread as it changes the color and sometimes leaves particles of the coating on the thread or on the fabric that show and are hard to get off. I use thread heaven or beeswax on the thread where it is not going to show, such as sewing down beads or goldwork embroidery.