Existing units target the TSA and equivalent agencies. New units will go for drugs in cargo, baggage. Will target DHS, Coast Guard, shippers.
I have always thought since all currency is covered in cocaine residue it would be simple to detect bales of currency being shipped and to confiscate that for whatever reason would give the detector owner a payback on their purchase within a week.
Other meeting comment re: TSA checkpoints emphisized the items not caughht were pointy objects, etc. getting past the agents. The B-220 and H-150 have failure rates well below 1%.