One of the OG Mule heartthrobs Jeffrey Foucault gives a lesson in starting off playing in open D.  Covers how to tune your reso to open D, picking a slide, proper intonation, basic chord shapes and teaches "Pay Day" by...

From deep within the realms of quarantine in Winnipeg Mr. Landreth drops some knowledge on learning the fretboard in open D, and shares a couple ideas on becoming familiar with it. The lesson is about 10 minutes long and is...

"You can play slide in standard tuning????" Prior to Mule I had only heard of Warren Haynes doing this and it made no sense that was possible Ariel shows you its not.  He goes over a few simple ideas - slide technique, right...