90mm viewfinder on 6x17 panocamera

90mm viewfinder on 6x17 panocamera, only 3 pieces and one screw. Print it better than I did please!

First, insert the optical 0.45x wide into the body, the ass has 30.5x075 screw, and must be screwed in now. Previously break in the screw, please!
Now it's time of a conic head M2x8 that holds all together.
You can print the front mask plain, “oreo”and “oreo reversed” like shown.

It's SNUG fit, first the tab under the front hood, then arc it to snug the second tab, then press the sides DEEP in. 
 

https://www.amazon.it/dp/B088ZVCK7M? this is the source of the optics, was 20 eurs and it's fairly good.