trying it out, first thing I notice is that when I want to add something that isn't already built in it tells me "that source is already in the collection" when it clearly isn't
Thanks for trying it out. Sounds like a bug in the collection editor. I want to improve that process to handle cases like yours -- if you don't find the feed, make it easy to look it up and add it -- but I wasn't sure that was top priority since a lot of people end up using feeds that are already in the system.