Summary: Dan talks about the various IH models and gives little insights on the changes that happened over time. The Binder Boneyard Podcast is hosted by Dan Hayes and produced by Bradley Parsons. Music by Bradley Parsons Support the show on Patreon: www.patreon.com/thebinderboneyardpodcast Follow The Binder Boneyard on social media: Instagram: @thebinderboneyard Facebook: The Binder Boneyard www.thebinderboneyard.com www.trainsoundstudio.com