Custom taxonomy in URL showing 404

Got to the bottom of this.

How to create a permalink structure with custom taxonomies and custom post types like base-name/parent-tax/child-tax/custom-post-type-name

I started from scratch with a whole new content type and the first answer in the solution above worked for me.

I still had a few duplicate url issues from trying to resolve the original problem, but I was able to do a bit of tidying up to take care of that.

tech