Good read, but:
"it doesn't tell me how to fit one to my 1.4 N/A engine"
I certainly wouldn't bother fitting a turbo to a N/A engine. I would start with the turbo version and go from there. Changing an engine from N/A to turbo is an awful lot of pain for little gain, unless you spend a lot of money and time duplicating the turbo version of the engine and what would be the point of that other than for the experience?