Watch the Cross Saw Solo online guitar lesson by Jeff McErlain from Essentials: Advanced Blues Soloing
The main theme of this solo is motivic development, which is a fancy way of saying taking a theme or an idea and expanding for embellishing upon it. It's a classic approach to take on creating a solo or melody, although they should not be all that different! I'm always trying to think melodically when I'm playing, as all my favorite solos from my favorite players seem to do the same thing.
So, as you work through the attached video, pay attention to how I embellish the melody slightly each time. I look at this as a fun creative challenge that pushes me to investigate the options available to me on the instrument. I truly believe this has made me a much better musician and guitar player.