Botllenecks !

Citation :
GW: How did you hit on the idea of playing slide guitar on the track?

DG: I guess I was never particularly confident in my ability as a pure guitar player, so I would try any trick in the book. I'd always liked lap steels, pedal steels and things like that. I can't remember exactly what I used an "One of these Days"; I may have bought a lap steel by that point, but maybe I used a regular guitar. When I tour, I use two cheap Jensen lap steels customized with Fender pickups for slide parts. The lap steel on "One of these Days" is tuned to an open E minor chord - E, B, E, G, B, E, low to high. The other lap steel is basically tuned to an open G chord [D, G, D, G, B, E, low to high]. I use that for "The Great Gig in the Sky". You'll notice that I kept the top string tuned to an E so that I could do major and minor chords on the first three strings.

The only thing I don't do is regular slide guitar with the thingie on your finger. I've never had any interest in that.

Citation :
Lap steel guitars also contribute to the palette of Pink Floyd guitar sounds. According to Gilmour, these were “cheap Jensen lap steels, I had customized with Fender pickups for slide parts.” The earliest use of the lap steel is heard on “Fat Old Sun” from Atom Heart Mother. They received even greater play on the Meddle album. For “One of These Days,” the tuning is an “open E minor chord, low to high: E B E G B E. The other lap steel is basically tuned to a modified open G chord, low to high: D G D G B E.” The top string was kept tuned to E to allow Gilmour to make both minor and major chords with the top three strings. This tuning is used for songs such as the “Great Gig in the Sky” and “Breathe” from DSOTM. (GW, 12/01)