W8 Top idea. Most folk looking over an a/c ...doing a DI, whatever dont look underneath.
Intersesting things you will see....
Air flow lines of the oil streaks. Missing inspection hole cover. Chaffs on U/c hydraulic line. Screw or 2 missing from hub cap. Stain and fuel fumes wafting from drain holes !!
..but its a long story.
Not sure that on a warm afternoon I would have lasted 45 minutes without dozing off.
But on some occasions its well worth a look