Dremel Digilab Spool adapter and case

The Dremel Large spool adapter allows for the use of the Polar 3D filament spools.I am a student of a design and modeling class at Liberty Jr. I was challenged by my teacher to create this design . The materials are as shown
4x #8-32 Nylon Lock Nuts
4x #8-32 x 1 in machine screws
the instructions are as shown
1. place the adapter in the position you so wish and create markings.
2. drill each marking through.
3. insert the Machine screws and screw them into the nylon lock nut until you see