Hi all, My name is Lee and I live in Illogan, Cornwall in the UK. I have decided that I need a new hobby. My old hobby was Austin Seven vintage cars. I have three. 2 1930 based A7 specials and a 1932 A7 saloon. I will be selling them sometime and will attempt to make a working model of a 1930 A7 engine. I am designing the castings on my computer trying out some cad programmes. I use FreeCAD which can do almost anything, especially annoy the wosname out of me! I also use Solidworks. I have managed to crash Solidworks a few times, not as often as FreeCAD though. I wanted to make a 1/4 scale engine but soon realised that was super tiny (73.25mm long x 33.5mm wide for the head). I then went on to 1/2 scale, that seemed a bit big so I settled on 1/3 scale. I have now gone back to 1/2 scale for my first attempt with the option for 1/4 and 1/3 a possibility. I have watched many video's on Youtube about castings, mainly of aluminium, and some of cast iron. I would prefer to make the block and head from cast iron, but that might be for later on. I think aluminium will do for a start, with cast iron cylinder linings. Should I use a harder metal for the valve seats? It's not an engine that will be run every day, but I don't want to destroy the block (side valve). I am also looking at buying a small lathe and a milling machine (Chinese?) and also a 3D printer to help with making the moulds. I am lucky to have some full size drawings and a spare engine to measure. Lee.