I don’t suppose it’s possible to ditch the folder structure altogether and just include all piklist parts code in the plugin file? I’m really liking Piklist but I find I’m having to manage a large number of very small files. For example I have half a dozen custom post types, each as a separate plugin, with each plugin having its own set of Piklist files. There’s a lot to juggle with the current setup (though I may very well be an edge case).