> > Is the assumption that the A188-2 tapped BBD would be suitable for

this

> > purpose, provided that you only use one tap, correct

you should also take into account that the fastest possible clock
speed (or shortest delay) is also determined by the bbd chip itself.
the mn3011 in the a188/2 cannot be overclocked to the same
amount as other bbd's. for example, if an mn3011 would have
a 256 stages output, then the shortest delay time would not
be the same as for an a188/1 with 256 stages.
in other words, an a188/1 with 128, 256 or 512 stages will
serve you much better, if you want to do karplus strong synthesis.

best wishes

ingo