Alright! I didn't know about podcasterwallet.com. #[2] I would give podcasterwallet.com a try for adding the Fountain.fm splits and any other splits you want.
Discussion
There should be a way to find the right code to direct the split to your Fountain.fm user or podcast on Fountain.fm.
I think you use the Fountain node, key and value tags from looking at the Citadel Dispatch example on Podverse. https://podverse.fm/podcast/Qx-F0bRsqYx