Macro converter for Nikon

Hi, this is my version of the macro converter (revert lens) for Nikon with F mount. It is designed for 52 mm lenses, tested with:
- Nikon AF-S DX NIKKOR 18-55MM
- Nikon AF NIKKOR 50mm f/1.8D

Part 1:
You need to put a UV filter on the one side (tight fit) and other side mount at Camera body.

Part 2:
It is a protective part designed to mount on the reverted side of the lens. You can also screw another 52mm UV filter to protect lens glass.

On both parts, you can find dot marks which work as white dots to help with the mount.
Important, Nikon AF-S DX NIKKOR 18-55MM doesn't have an aperture ring. To workaround it, I added an inset to the part2 to open the aperture (use dot at lens and dot at part2). If your lens has an aperture ring and you want to use it, mount part2 at a different position (dots cannot match).

Source file attached.