Thanks for the info. I'll look in to getting some more pillows. I was just planning on dropping them in like Jared did in post 427. Looks like his results with just one pillow match yours so hopefully just adding another pillow on top will smooth that right out.To add to what Jared already stated, I would recommend getting three additional pillows.
Here’s the close mic of Jared’s (now your) two cabs, along with mine loaded with two vertical pillows.
The vertical pillows seem to completely remove the rear chamber resonance at 110hz.
The port resonance at 140hz is unaffected, of course.
Here’s a (bad) pic of my pillow placement: