My name is Michel Anders and one of my alter egos is a part-time Blender add-on developer and Open Shading Language shader writer.
A lot of my add-ons are free and you can find them on this website or on GitHub, but I also have professional add-ons and books available on BlenderMarket.
You can contact me by private message on Blender Artists where my nickname is varkenvarken.
I really like your PlaneFit Blender add-on. Do you have any plans to update it to work with Blender 2.8? That would be awesome. I tried modifying your script, but sadly without success.