Lee Oskar diatonic, and custom Spiral tuning. Chromatic harps 

by Hohner and Suzuki.

I built this lap steel to sound like a Pedal Steel Guitar using palm-levers to raise the pitch of two strings.  Live video here: https://tinyurl.com/y6hcaf63

This 6-string acoustic guitar became a Hindustani Slide with the addition of twelve sympathetic "buzz" strings. See video here:

https://tinyurl.com/yx8z5ck6

Live video here: 

https://t.ly/y2zd5