OOOPPS!!

The lid for the box ended up a fraction undersized. Rather than 'make do', I decided to make a new lid for the  box and a  new box for the undersized lid. The picture above shows the book matched panel being glued up using stretched masking tape on both sides to draw the joint tight.

Here are all the components for the second box. The coloured dots  keep  everything in the right place.

Here is the offending lid, it's only a tenth of a mil undersized but the hinge fitting method needs perfect alignment. 

The new box has conventional through dovetails and it's shown here being supported on a  notched planing board being planed smooth ready for final sanding. I'm not left handed but you need to come at this from both sides in order to avoid break out of the end grain.

Here's the new box assembled ready for the lid to be fitted.