HP Integral questions

I've been reading the HP Integral service manual that Al kindly put on Bitsavers [1], It's a strange manual in that it includes schematics of the main logic boards. Why, I don't know, other comtemporary HP computer service manuals didn't. Not that I'm complaining... Anyway, various thoughts occured to me as I remember some thignn about that machine 1) Did HP ever produce the CS/80, SS/80 or Amigo drive exerciser software to run on the Integral? It seems it would be the ideal machine for use as a drive tester since it's so easily portable. 2) The later version of the OS ROM module has a space for an option ROM PCB. It seems like this would be trivial to recreate (schematics of the ROM Mmodule, inclding the pinouts of the option board connectors are certainly in 'my' Integral schematics). If enough people are interesd, it might be worth laying out a PCB... 3) The manual mentions that the Integral expansion bus was an implementation of some other HP standard bus, but only rows A and C. What other machine(s) used a similar bus? I can't think of any. [1] I've also been reading the HP9000/200 Pascal 3.0 system docuementation. A wonderful mine of information, but oh so annoying to read on a screen... -tony