Calculate mesh volume and surfacee area.
Check for bad geomtery and fix it with Make Manifold.

Edit
Create consistent thickness for complex shapes with Hollow tool.
Scaling tools to fit your model to specific boundaries or volume.
Rotate model by aligning selected of faces to the print bed.

Export
Quick export selection to STL, PLY, OBJ formats.

Location: 3D View → Sidebar
Documentation
Original Author: Campbell Barton
What’s New
Hollow
New Hollow tool: create surface offset without self-intersections.
Fixed
Scale to Volume/Bounds: error with no objects selected.
Cleanup
Remove dead code.
Export: remove X3D option.
X3D exporter add-on is no longer a part of Blender. 

Downloads: show love to dev by purchasing if you can afford it

IF THE LINKS ARENT WORKING, THEN PLEASE ACT LIKE A GROWN UP AND MESSAGE ME/ COMMENT HERE OR ON DISCORD AND I WILL UPDATE THESE LINKS QUICKLY! MAKE SURE YOU DOWNLOADING PROPER FILE WITH PROPER EXTENSION LIKE .ZIP OR .RAR

Filename:add-on-3d-print-toolbox-v1-0-0 vfxMed.zip

Official Discord : https://discord.gg/M2kqB4M9tG

Recommended link below => FULL SPEED.

USE IDM FOR FASTER DOWNLOAD.

https://www.file-upload.org/o0up45gktb8b

MIRRORS:

for mega and g drive links – contact admin.