Made this a while ago, thought I'd give it away. Watched the show and based the design on what I could grasp in the show

Blade A has a Blood groove in the middle of the blade and Blade B is just a smooth surface. Both Blades are split in case it needs to be printed on a smaller printer, in which case you will need wedge B to join the split blade pieces.Wedge A is used to join the Blade to the Handle