Markbb - Just a preference to not use water. I knew going it was built with a water pan and Jay designed it to be used as such, but after trial , I prefer cooking it dry. I don't believe the water is necessary to regulate temps. I also like seeing little whisps of sweet blue rather than white steam. So far, results have been very good in four competitions plus personal use. No complaints and no desire to switch. Cleanup is also a pleasure.
ZBQ - If I try the WSM ring w/Guru, I know I will need to preheat the cooker first with the usual full chimney to get it up temp and then just use the WSM ring and a few lit on top of the unlit for the rest of the cook.
Without preheating, I don't think one ring of unlit is going to last long as it would take a lot of charcoal and time using Minion Method to bring it up to temp like a WSM based on the amount of steel compared to a WSM.
Right now I'm just trying to think what approach I will try. Good news is, I know how to adjust quickly if whatever option I try does not work. It is quite easy to just go back to standard lit chimney every few hours by taking out the ring and repositioning the charcoal.