Universal Adapter Smartphone-Binoculars

I have designed this universal adapter to take photos/videos from any smartphone with any binoculars. The combination smartphone/binoculars helps to make great photos at long distances! I have made it to take photos of whales and dolphins during a boat trip. #HP3D

Suitable for a 12x12x12 cm printer or more.
If you test it please leave a comment with the brands of both your smartphone and the binoculars you have used, and if it works or not, so I can update the list below.
Also, you can ask any question, I would be happy to answer.

Main features:
-Small
-Easy to use (see "how to assemble", and "how to use" below)
-Fully 3D printed (no additional screw, nut...)
-For binoculars and microscopes

I have tested many 3D printed adapters for such a purpose, but I was not satisfied so I made my own. The screw holding the smartphone has been inspired by the great design of OpenOcular (https://www.thingiverse.com/thing:2567141) that is used for microscopes. But the device is too big and not usable on my binoculars.

How to assemble the pieces?
I have made a gif on how to assemble the pieces, check for the gif beside with the photos.

How to use it?
There are an image and a gif beside, to explain how to use this adapter.
Here are the main steps:
-STEP 1: Place the smartphone between the holding pieces ("L-piece" and "X-piece"), then tighten the nut of the "L-piece".
-STEP 2: Rotate the second nut on the "X-piece" so that the middle of the X is placed just in front of the camera.
-STEP 3: Place the "X-piece" between the eyepieces of the binoculars, then close the eyepieces.
-STEP 4: Slide the smartphone horizontally until the image is neat.

Here is the list of the smartphones tested with this adapter:
-iPhone 4
-iPhone 4S
-iPhone 6S
-Fairphone 2
-Redmi note 2

And below is the list of the binoculars tested with this adaptor:
-Prostaff (Nikon)
-Aculon (Nikon)

Printer size: 12x12x12 cm or bigger;
About 3h of printing;
Density: 20%;
Resolution: 0.2 mm;
With supports (https://www.instructables.com/id/Best-Support-Settings-for-3D-Printing/);
I prefer to use a raft;