I just created a time-shifted version of a podcast.

I got the rss feed - https://feeds.megaphone.fm/GLT4787413333

Then mucked about a bit with it in vim

:%sort
:%s/<Enclosure url="//
:%s/?..*//

…then pasted the list of mp3’s into Create a Podcast | Fourble

This gives me a feed for the podcast beginning at the beginning - The Rest is History (Goalhanger) podcast | Fourble

I’m not yet sure if it will be in the right order :)