Yep Apostle, that was the thread. The guy behind Ishen Sound, Grob, was a promoter who had been putting on punk, psychedelia, hardcore and The Orb in London under the name Sonic Relief. Heady days.
No real link with Aba apart from playing at House of Roots, and Aba cutting the album at JTS. Ishen didn't have their own sound system, but had residency at the George Robey. They ran an allnighter there for about a year along with Zion Train & Revolutionary Dub Warriors.
They weren't really musicians either, Dread I Knight (a junglist) did most of the (sample-based) recording work for them. There was also a 12" of Geronimo/Heavy Dub. Grob was a big fan of Iration Steppas' 'Scud Missile' at the time