Yeah, no need to have all those macros when one will do. You set up a popup list in which the value is the destination file and the displayed option is the "contains" string you used in your macro. Then just one Open action will act on the value passed to it.
For an example of this (which lets you write a simple text file to make the associations for applications, file and folders), see A Few Favorites Macro. Or, you know, just use that 
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