What a hot-looking top, love it.
I did lots of experimental perle cotton embroidery this winter with #8, #5 and #3. I realize you have basted this project but to save your fingers, would you consider removing the basting stitches and then doing the stitches and designs you choose on the top only? I think you would get better results. Then instead of batting use a layer of woven material such as flannel, then the lining and tack all three together.
One other unconventional way of embellishment would be to couch your motifs in heavier thread either by hand or machine. A wow in metalic.
Whatever you choose to do---enjoy! :thumbup: