although the parts you mention #3&4 are the development of samadhi not sammasamadhi itself from my reading of the passages
As I understand it, it is implied that these developments of concentration are, or at least in order to be true samma-samadhi, are complemented by the rest of the eightfold path as that quote from MN 117 states. Also notice that the first item of that list, jhana, which is often associated with right samadhi, doesn't have the epithet of "right" attached to it either. But I don't think that this means that they aren't talking about right samadhi here.
But yeah, it doesn't explicitly state that they are right concentration, either. But I think when you take all of the passages together, the picture is fairly clear. Any singleness of mind, weather focused on the development of jhana, or in contemplation of the aggregates or of feelings, or all of them together, when supported by the rest of the path, becomes right concentration.
-Brizzy: So, what exactly is your point?