Hi Jim, its gettin there, don't work to a sketch at all, I form the basic idea in my head so I always know roughly where everything is heading ,however sometimes once a project is in progress some ideas for modifications /additions will present themselves.Like for example the waterfalls in the pond,I was only intendeing to do one originally, then when I laid the stones saw an opportunity for two,then three and finally ended up with four ... the O gauge section I know I want a double track mainline all the way round the circuit but what sidings there'll be ,how many and where I'll decide when I get things pushed on a bit... but no,nothing goes down on paper...all in my head !!