Thanks for the excellent pics JT. Back in Jan when you first mentioned this I opened that access panel for the first time in 3 seasons of burning. Good bit of soot piled around. Not really a terrible job. Once all the Spring chores get behind me I'm going to clean again and remove the turbulators this time. At the moment in full hunt mode trying to find a 1000 gal propane tank so I have storage for next year. Been a while since I've been here to the sticky and want to thank BStevens for his grate suggestion. That sounds like a "grate" idea to keep a good bed longer.
I tried a grate over the nozzle for a few weeks. Worked great to hold the coals but I noticed increased erosion where it was sitting on the ceramic. So I stopped using it.