The model requires the addition of:
4 x m3 nuts
2 x m3x10 bolts
2 x m3x4 bolts

The nuts should be pressed into place and the screws can be screwed in. The side of the knife with the blade cutout can be used to hold extra blades. That side screws into place while the other side is glued on. I've found the CA glue works great. 

A hex key for m3 bolts can be slotted into the hole on the BladeStop part. It may need to be drilled out slightly.

Enjoy the print!