oh yeah! Definitely start with The Cricket and the Genie - Movement 1: The Delirium from their first album, “The Monolith of Phobos”. It’s literally The Beatles meets Primus, so unbelievably good. If you like that song and what you’ve heard from Primus, you’ll adore the rest of their music!I'll listen to the original songs by The Residents, to make a comparison and see which version I like the best.
Also, you said something about Les' project with Lennon's son, another thing that I discovered in my research, and I forgot to google it to know more about it. Do you have a song in particular that you think I should listen to first?