sam: just curious. i assume you save all your drawings. if so, do you ever go back thru them to create a new engraving? or is all your new work just created without referencing your drawings?
I sometimes refer to my sketchbooks when doing layouts. Like this page for instance, there's a variety of different elements and I might use one or some of them when designing for a job. Most of the time they just come from my head, but I don't hesitate to use reference material if/when I need it.