Duncan asked for a respin on the knife boxes with some slightly different dimensions more suited to his knives, at the same time he wanted to try a sliding lid. This design uses 1.5mm birch to form rails down along the top which is much more reliable than engraving slots. Because the rail is only on two sides it can be made with just the tiniest slither of 1.5mm, which is twice as expensive as the 3mm. It also only adds a small amount to the overall height so it's a nice compromise. I laser cut some cardboard inserts to go into the boxes to hold the knives in place. Duncan sent me the handle shape so I'm not sure how he worked it out but it's easy to see why a laser would be good at consistently cutting a curve like that. I also revamped the originally flappy lid design with the new dimensions, it's a slightly better design for this purpose so this is still the one we're going with.