Even without an oversized dovetail jig, you can create beautiful dovetail joints in blanket-chest-size panels. WOOD magazine's Craig Ruegsegger demonstrates how to make a regular dovetail jig work on panels wider than the jig's capacity.
This how-to woodworking video runs 14 minutes.
NOTE: After submitting your order, clicking on the "Download Now" button will download a PDF document to your computer. (To view that document, you'll need Adobe Acrobat Reader.) Follow the instructions in that PDF document to begin downloading your video.