I will pass on the request. I am not sure if he will get back there yet this week; he has another job he works. I thought your claim about 2 truss rods was wrong, but sure enough the photos in NGP Volume V seem to show there's only 2. If I saw those photos and didn't know they were original I would have said "someone did a poor restoration on 0577". The needle beams also look wrong!
Seems like the 1920's rebuild projects weren't all that standardized!
You learn something new every day.
Bill Kepner