Mark - somewhat heartened to read your reply to paraflyer17 as it echoes recurring thoughts I keep having - as a man in a shed with welder, lathe, 3d print, laser cutter not afraid to design and build things... as I stare down the barrel of what feels like excessive costs of around £10k to get going esp when it comes to the frame. Generally in life I will always pay for something when the cost of it passes a reasonableness test but if it doesn't, the itch to build is hard to resist - however as an utter newbie and all this kit being safety critical I will just have to suck it up. Bloomin' top of the range 150cc petrol engine for old hobby (large scale RC) was £1k can't believe these have many different cost drivers mutter mutter