bringing this old thread back up since Mr Ainslie has been popping up on the Robert Johnson thread.
I noticed I mention his resonator playing on Parchman's Farm from his Terraplane album. Actually, he's playing a Diddly Bow, essentially a primitive Delta instrument composed of four nails, two wires and a long plank.
If you dig the Blues, Terraplane is a must-have. It also features two originals by Scott, Change my Name, and Baby Walks on Fire.