I'm going to say it one more time, KEEP THE BASS LEGATO!
This is easy to forget when you start working through this peice. Play the bass line solo to get a feel for how smooth it should be, there needn't be any breaks between the notes. This is going to reap benifits upon your fingerstyle abilities if you can master it. Another thing to pay attention to is the dynamics of the different parts. Sometims the harmony line will die out because you're focusing on the bass and melody, and the piece just isn't as impressive. Practice, practice, practice, and send me a message if you have any questions or comments. Good luck!
By the way, if you enjoy this piece, check out my Gravedigger Blues!
It's my own personal composition, it's real fun and real bluesy.