My main concern is, what is the safety limit regarding the vacuum
applied, say, to the delicate pouch leather and like, and the gluing
of same?

100 inches vacuum is getting very high and should remove the offending
dirt.  I have not put my tracker pump on a vacuum test as yet.

Also, what is the average vacuum that the cleaners produce?

Stephen Bentley - SB-"O"rolls
Vancouver, British Columbia, Canada