Heyo, I have the 11 lp set of Zep studio tapes, stuff left on the cutting room floor, I'm going to go through them (alas, what a chore...lol) and look for mando cuts. If I find any I'll drop in a list of what I found, I'm pretty sure there are a few that are 20 minute practice noodling 'round sessions. Might be interesting. peace