Hi Wayne, I just got back from Cambridge today and the parcel was waiting for me at home.
Lots of useful & interesting stuff there, thank you! 68000s, Big EPROMs, 8255 PPIs, all good stuff.
Half-way up the A1 my phone rang, it was the campsite lady, I'd run off with her key! I've just posted it back!
Think I'm losing it...

...but the dogs were pleased to see me
Thanks v much Wayne
Pete - the Imsai was indeed a commercial clone of the Altair 8800, in fact it was
the very first clone computer.
That particular one is immaculate and working perfectly, Dave has done a lot of work restoring it.
You'll remember it from the 'War Games' film and the 'Whizz Kids' TV series
Dave even had the Joshua voice synth connected up...
"Greetings professor Falken..."
Phil