I have put the below diagram up on Flickr - but perhaps the smaller size here is good enough.
The diagram shows how all my connections come together. It may be of help to someone - ask if something requires clarification. The whole set up 'kinda' evolved over a long period - so it may not be 'ideal', whatever that is.
Everything works quite well - image (11.5 MB) downloads to the Fujitsu computer is about 8 seconds. No complaints about that - even though I have no idea how that compares with anyone else.
I put in a WiFi extender, so now, once everything is powered up, I can control the whole imaging process from the desktop inside the house - using TeamViewer. Talk about staying comfortable in those winter nights :devil: