Thank you I made these last night, and they were awesome. Here's a tip: don't touch the roaitsng peppers on the comal with your palm to make sure they're hot. I spent a few hours trying every folk remedy on the interwebs to try and stop the pain, and the only thing that worked was spraying on 409 (it cuts grease, and it's the oil in the pepper that burns, as you point out in the recipe) and wiping it off with a towel, not water. I've never needed gloves to de-seed serranos or jalapenos, so I was a little shocked at the power of those dried guajillos. Damn! But there's a little sauce left over, so I'm gonna make it again for dinner tonight and see what it's like to eat this dish without one of my hands soaking in a dish of toxic spray cleaner . . .