Well guys and gals, the darn thing works. Final tests were completed todaywith satisfactory results. Details can be found in an addendum to my QRZ page
(near the top of the page).
I still have a lot to learn about Yagis, but I definitely gained a better understanding of their underlying theory and operational characteristics as a result of this project.
New hams should consider building their own for this reason. I will soon be 85 years young and I'm still learning.
Good hunting,
Cecil Chaudoir
W5HWU