Well, the upgrade from 1.3 to 1.77 went without a hitch.
Now I'll just have to get the rest of the 'shed' system:-

Mac Pro; have
504; need
v
561; have
v
DSP5000 or M1*; need and need to make my mind up which way to go...

Thanks again guys,

Steve

*I'm looking at making a M1 homage, I have the dome midranges and a 6 channel amp so far...