Thanks, RonP!
One follow up question: You mentioned that you haven't entered the run in almost a decade. Do you have to stay out so that you don't compact the compost or is it just because you don't want to wade through it?
Thanks again for all the information!
You are making it more complicated than it is.
I haven't entered the run simply because there hasn't been a need to...

Currently there is a good 2 1/2 feet of dense compacted carbon matter above the original soil level. I am surrounded by large trees...
I could probably add nothing for 3 or more years, still have no odors, and produce plenty of compost.
Hope this helps, Ron.