Have got this far;
The main problem has been the lack of documentation that comes with this stuff these days - with the honourable exception of the motherboard and the distraction of running over this beach with grandma and grandchildren
Spent a couple of days pondering how I was going to extract one of the SSD's from 'old faithful' and stick it in 'ere before the obvious occured to me ; just buy anuvver one and I need to get more USB ports too. Have realised the ones on the front are going to be useless for fixed items like a joystick and TrackIr....