First of all I'd like to sincerely thank my Cousin Adam for the time
he's devoted to this and I don't think finding time for this sort of
thing would have been too easy between Home Duties - 2 the care of two
toddlers - and work commitments, however the job's done now and I can
tell you some of the results.
I booted the machine a little while ago though I didn't get any audio
through the HDMI, perhaps the Denon AVR Receiver is playing tricks but
that can't be dealt with right now so will have to wait for sighted help
to deal with that one so decided to take the audio path from the
headphones output into a Bose Soundlink Mini Aux-In which did the trick.
Volume upon startup is incredibly low so I played about with the
attached USB keyboard a bit and found an adjustment to adjust the
notification volume but as yet I've not found out how to actually get
Google Talkback to speak any louder than it is doing.
The interface thus far - given I've only been looking at it for a few
minutes mind - is surprisingly easy to get around, the arrow keys, space
and enter seem to do surprisingly well.
The "Desktop" is surprisingly uncluttered and I noticed the Calculator
and Google Docs Apps amongst the Icons.
I'll leave the machine to its own devices connected to the Home Network
via an Ethernet cable just in case it feels it wishes to update
something or other and get back onto the tredmill a little later on in
the evening.
Again thanks for everyone's interest and encouragement with this project.
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Those who don't need help are prepared to help themselves