Couldn`t the S300 Tempo Spotter be used as an interior detailing tool the same way the larger extractors are used? I understand that it is a cold water unit, but wouldn`t applying a pre-treat solution (Prochem, etc.) and then maybe pre-scrubbing the carpet/upholstery with a good shampoo mixed with hot water by hand, scrub brush, and bucket...and then follow up with the Tempo spotter do an awesome job too? For $319, I`m very tempted!