3D Marble-Maze - Remix for cheaper domes

A remix of the rings that hold together the domes of the maze. The domes in the original would cost me around €65,00, I think that's too expensive. I found an acrylic ball in an oneline store that's way cheaper (€6,50!)

Search online for ‘acrylic ball 20cm’ or something like that and you'll find one.

Needed materials:

• 12x M3 8mm countersunk screws
• 12x M3 nuts
• Glue
  I used Bison Kombi Plastic, but there's probably a lot of others that work too.
  
   
• (Masking) tape (for assembly)

Instructions:

1. Print 2 of each model (6 parts in total.)
2. Drill out the screw holes of the bottom ring parts. Make sure the cutouts for the nuts are clean, as remnants of plastic could prevent the screw to access the nut when screwing things together at the end.
3. Cut 4 ~6mm pieces of filament, straighten them and put them in the holes on the ends of the bottom and top ring parts (I made 2 holes on each side, but I only used one.)
   
   
   
   If it's a loose fit, use glue to make sure the ring stays together. Be sure not to mix up the top and bottom parts!
    
4. Glue the bottom ring to the bottom dome.
   
   The bottom dome slides into the top dome when put together, the eyelet isn't flush as is with the top dome.
   
   
   
   Stand the dome on a roll of tape, so it doesn't wobble and put the bottom ring on the dome. The eyelet should be beneath the ring and the inside of the ring should fit snuggly around the dome.
   
   
   
   Use (masking) tape to stick the ring to the dome if necessary. Use the pockets in the print to glue the ring to the dome (I used a toothpick to apply the glue.) Make sure the glue stays as flush as possible with the ring. If needed, use a file or sandpaper to remove some of the glue after hardening.
   
   
   
   
    
5. Glue the top ring to the top dome.
   
   This is a bit harder than glueing the bottom ring, as there's no ledge for the ring to stand on. I used masking tape to stick the ring to the dome for glueing. Be sure the ring is a bit higher than the ledge of the dome.
   If there's a burr on the eyelet like on mine, remove it.
   
   
   
   Use the pockets in the print to glue the ring to the dome. Make sure the glue stays as flush as possible with the ring. I did this in 2 steps, first I put glue in the pockets that where accessible (no masking tape over them) and let it harden. After that I removed the masking tape and put glue in the rest of the pockets. If needed, use a file or sandpaper to remove some of the glue after hardening.
   
   
    
6. Put the 2 domes together, with the center rings in between and screw them together. If there's no excessive glue, they should go together nicely.

Follow the instructions of the original model to contruct the maze and put it all together.