Awesome tutorial man, I’ve just implemented it in 4.19 preview and it works great. If you find the time, it may be worth going back and updating some of the sections with the edits you made later on especially the build.cs changes as this had me googling for a few minutes only to read the edits in the subsequent section after I had already implemented the fix.
Also, a little more detail on what some of the things do would be awesome and allow people to take it further.
Great tutorial overall though and provides people with a good foundation to build upon. Top Marks!!