I didn't say anything about Sir Douglas Quintet I was talking about this venue http://en.wikipedia.org/wiki/Vulcan_Gas_Company which according to that article was in Austin as I had thought.

also
Don't think anybody's mentioned Moving Sidewalks so far, who have just had their complete recordings or reasonably close to released on a 2cd last year. Been meaning to pick that up, maybe later.
ZZ Top are great but not overtly psychedelic for the most part, but they do feature one of Hendrix's heavily regarded guitarists in the shape of Billy Gibbons the same guy who was in the Sidewalks