Hi Phil.
Cracking progress, makes me want to crack on with mine.I would recommend popping down to the library (or amazon) and getting Electronics for Dummies. I found it invaluble for getting my head round transistors,resistors, LED's, diodes etc. Seems a bit patronising when you first start it but it really is a good basic reference manual.
Loving the line up of Grids and the low relief buildings.
Keep up the rapid progress
Guy