Thanks for the info. Terry. Several things in your Post I had not actually registered before, although I had read about them.
It is evident that C.T. Russell was a terrible plagiarist, rather than an original thinker, when looking at this matter a decade or so ago I read in my edition of Studies in the Scriptures a Letter that Russell had reproduced from Piazzi-Smythe commenting on Russell's Book. If you read that Letter with an open mind, rather than praising Russells conclusions, Piazzi-Smythe merely is polite enough to acknowledge the Book.
Also, Piazzi-Smythe was not a great, reliable academic to seek praise from !
Also, when reliable measurements were actually made of the Great Pyramid, they differed from the ones Russell was using ! So all his Charts and calculations were rubbish as you say, "Pyramid Inch" or not.
How strange that the JW's still accept, and in fact make as their foundation for all teaching, and indeed their Orgs very existence, the 1914 nonsense that Russell also devised, with very little adjustment. Russell also plagiarized this idea too, from William Miller and later Adventists, yet without it, JW's would not be.