i make a blender addon for helping make 3d print ready model easier with some feature like
- calibrate blender to 1 : 1 scale, I mean 1 blender unit = 1 mm
- help make dimension guide to help you model gently in correct size
- advance checking model : to make sure your model has 0 problem when it printed
- auto rename tool, based on hierarchy mesh
- real zoom scale ; make what you see in your monitor is real size ( same size as you print)
https://bit.ly/Handprint_Tools
hope you want to try my tools also hope my tools is game changing for you