I posted a picture of my cone 6R soda test tiles that John Britt fired in his soda test kiln two days ago. We both forgot about adding borax to the mix so the flashing slips are dryish; but we got good color. We'll re-fire them after the TRAC tour and by then I should be able to get more cone 6 glazes batched to add to the firing.
If you click on the photo, it will bring up a larger version of it.