Well, I've been released from the people garage. We repaired a section of ductwork. Run into a couple of problems. The pump began putting out too much pressure, and there is some difficulty in the air intake. However, they may correct themselves as recovery progresses. I can already detect an improvement in the air intake. A couple more days and there should be pretty good improvement in general.
The quality of the air distribution is much improved. The damaged duct was 85% blocked. Record oxygen levels have been attained since repair completed.
Another couple of days and I will start looking for something to write about.