Glad those tips helped! I should add the bit about the drilling pressure to the tutprial.. I get the sense people don't realize how hard you can jam em' through.
Evenness is a factor of a lot of different things.. Grind consistency definitely matters, and packing weight, and the actual amount loaded..and the position of the chamber screen. If the screen is too close to the charcoal, you'll be more likely to scorch the front of the load before the rear of the load is done.
The grind consistency should be medium-fine, but not fine, or coarse. I lightly tamp down the load to pack it slightly..quite lightly, too hard and youll have airflow problems. You can try not tamping, and leaving a little bit of air space in the chamber.. this will let you shake the material up mid session, or slowly spin the okin in your mouth as you draw to make the chamber act like a tumble dryer, tumblin the load up... This is how I used to use the Okin in the early days, I find it gives a very even vape, but the vapor throughout the seasion is a tad lighter..less dense.. I can imagine why, the hot air has more space to move around and bypass the material. Worth giving a shot if youre after evenness. You can play with air space for that perfect balance.
Session duration plays a role as well, a longer heavier session will heat the steel chamber to the point of conduction vaping temps, this will even it out a bit.
Generally I tend to pack half chamber loads, and do two smaller sessions, vs. one big one. This will give ya more evenness when all is said and done.
And yeah! Its definitely an addictive experience!
Thanks again for sharing your experiences so far!