Comment by baby_souffle

> During COVID lockdown I learnt 3D modelling via Blender and so STLs are my lifeblood for 3D printing!

Blender is a good skill to have, no doubt. 99.9% of all the 3d modeling / printing that I do is "functional" and you need an entirely different set of skills/techniques/tools to build a functional part compared to the models that blender spits out. At the end of the day, all techniques do generate a list of triangles but "going backwards" from that list of triangles can be a massive pain in the ass especially if you have a precise modification that you need to make.

If you want to share your models _and_ make life easier for anybody that's going to tweak them, STEP files are the best bet.