For quite some time I have been in need of a lettering surface with adjustable light for use with grid lines or preliminary underlays. My solution was to build a slant board with Wafer light box set into the drawing surface. It took a couple months to figure out the design and construction technique which involved routing templates.
Nothing fancy with the wood or finish. Just some spare baltic birch plywood, a piece of laminate and miix of screws, hinges, bolts and a couple coats of shellac. Folds up with the base as a handle and very easy to transport to a CCC weekend lettering workshop.
Alan