Ian ... It is the 73 Stage (suitcase) model ...

Nigel ... You are right - it is ALL about the metal bars ...

I just got a very 'warm' feeling, playing it again ... It has been a number of years ...
I even played a couple of sequences on my kn6000 and played along with them ...
Almost don't want to give it to my granddaughter ...

Hey ... I sald ALMOST