All of Lupo's westerns look quite good, have a good looking production design, but none of them impressed me very much. 3 of them belong in the so, so category.
Buddy Goes West is a bit weaker, directing is not bad, Morricone's score is quite good, but it's intended to be a comedy, a pure comedy, nothing else, and it's not funny. 3,5 /10
California is too flat about it themes. 4/10
Ben and Charlie is an entertaining flic, yet no match for the Clucher comedies. 5/10
And Arizona Colt, entertaining as it is, suffers from often being a bit simple and from some lousy action scenes. 5/10
(6/10 is hereby still the mark which divides the good from the ok ones. Obviously I haven't changed my rating system like promised. It's somehow impossible for me to give a 6/10 to a film which is only short above average. )