John,
Thank you for speedy work! I'm surprised you don't have something else to do!! lol
I agree with all your suggestions, I think. I built layouts using Westcott's book. I still have the book, but think I have it pretty well down pat. Yes 60" is a bit high for reach especially. The highest I built was about 50 to 52" if I recall correctly. I already use a two-foot step ladder for accessing the Ceiling Central, and have a cheap rolling low seat for working down low. No more crawling on my hands and knees. Mine took a pounding working as a technician for over 30 years before moving to engineering almost a decade ago. ;-)
Ill say more later. Back to the old grind! lol