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Lot's of stuff I haven't even thought of there! There's a metal version of What Time is Love??? 
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I remember reading once that "The KLF destroyed Baby Club with an heavy metal version of WTIL".
We know that they played Baby/Coma New Years Eve 89/90.
We know that the man behind Baby/Coma was Kenneth Bager, the owner at Coma Records, which later released KLF in Denmark.

The Orb was warm-up "Playing sheeps nises to the bemused Danish pastries" (linernote from Music for Dreams vol.1)   
In the same linernote they mentions "an amazing 15 min version of WTIL".
A couple of years ago they (Kenneth Bager etc.) started another Bunch of Coma-parties and had "The KLF" to play a live concert.
Promoting this party, Kenneth Bager was interviewed on Danish Radio and he said that "This time it will a proper performance, and not just two men with keyboards". This "proper performance" was done by our old friend Wanda Dee.
The statements above can be combined to the following "An amazing (maybe 15 min long) version of WTIL with guitars was played by two men on keyboard new-years eve 89/90". 
Maybe this "metal-version" is related to "The Techno Gate", the one with Hendrix samples, (it took place before "Techno Gate" was released).

A new book about the history of Coma-Club was released last year, maybe I should try to get a copy of this!
Ulrik