Here are a few of my favorite Keaggy clips.
Ebow. (He was doing this stuff 30 years ago as I saw him in concert doing this tune then...)
Michael-Hedges style tapping from a 1987 album.
Channeling Holdsworth again from a 1987 album.
Electric goodness (reminds me of Larry Carlton, only different: love the riffs from 1:25 to 1:44) from an album recorded in 1978.
How to do it on acoustic from a 1998 album.
Not the fastest, not the best finger picker, not the most soulful -- but he can keep up with the best across ALL of them.
Cheers!