I own a Hill MK3 and honestly cannot recommend it. Made of carbon steel, flimsy threads. A pain to service and Hill's customer service is non existent (they will not even talk to you). The silly moisture filter was clearly an after thought.
I now also have a Chinese Bull pump, all stainless, way sturdier, very easy to service, more air per stroke. The guys from Bull actually talk back to you. I would replace the hose on the Bull, but other than that, the Bull superior in every single way to the Hill. And the Bull is about half the price from the Hill.
I have not used the Hill once since owning the Bull.