How come you lurked for so long - these are amazing. If I didn't know you were a draftsman by trade then I would have guessed. The attention to detail with wall thickness and just general sensibility of the maps comes right through. Love the gatehouse with double portcullises and little chamber for the guard. Most people like me just skim over these things.
I doubt many here have AutoCAD but it has been mentioned a few times. I use a little app CadStd for doing any DXF work - which is pretty rare but the app is free and easy to use but no doubt lacks a hundred options that AutoCAD gives.
Anyway - nice stuff - will rep.