Thank you very much Stan for this fast and thorough review!
I have two observations:
1. We have designed the v4 to operate better with 2 - 2,5 mm coils. So a bigger coil doesn't offer always better results, only an increase in temperature (depending on the resistance of course), which reduces the flavor. For a flavorful vape, a 2 mm coil is the best.
2. The Spheroid v4's AFC ring follows the same minimalistic design of the GP Heron v1 and v1.5. When we want to adjust the air flow, we unscrew a bit the tube, we find the optimal position by turning the ring till the slot comes under the Heron engine insignia for a full open position or where we like it and then we lock it. We did that because most people put their AFC at a certain position once and then they forget it and we wanted to avoid additional seams as well. Spheroid 4 is a mini Heron for many reasons
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