Looks great Jeff

I'm glad I have inspired you to try this for yourself. Did you shoot horizontally or vertically? If you shoot horizontally you can generally get a wider field of view on the shortest side, but it does mean more images. I'm curious about what your ISO was for the shots? 10 second subs are not very long for these wide angle shots. I'm guessing you used the 11mm end of your lens and thus I think you could comfortably shoot each sub for 25 seconds without noticeable movement in the stars, and thus you could lower your ISO a bit.