I am not getting the focused heat halo anymore and I am not sure why. My versa has some extra breakage holes at the top as I have reported before, which don't seem to hinder performance. It developed extra holes over time from the cracks, and that's when I noticed no more halo, so I wonder if more holes at the top did something to the heat airflow.
Another thing is I've been putting an extra screen (the stiff vapir mesh ones) in the bowl to minimize kief gunking up the screen, which seems to push the herb to the outer circle and leave the middle bare with less material once I'm done hitting. This makes sense as the screen gives extra thick ness in the middle which will cause less restriction around the circumference.
I'm pretty sure one of these things or both are giving me more even browning. Now that I read what I wrote, it's more likely the extra screen rather than the holes. I'm also wondering if due to the bowl shape, having more restriction in the center may create some type of heat focus or airflow pattern that extracts better.
Whatever it is, I'm going to keep doing it because it works great.
I forgot to tell that part......I guess the unit is working ok....
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I put approx 0.05g in an elb lid inside the Versa flower bowl and roasted it at 60v w/boost. Seemed to be a more even roast for sure.
I will try a larger quantity to see if the green halo issue has improved. I am technically on the clock at work........