There's no
room for a duaghterboard to mount on the HP 1000 card.
You'd have to mount it elsewhere and cable over to it.
Wouldn't that cost
you a few nanoseconds just in the cabling? ISTR
cable delays measured in ns/ft.
No matter what you use for communication, it'll cost you; the speed of
light is within a couple of percent of one foot per nanosecond, so
you're not going to do much better than that.
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