MikeE is a VERY high tracker, so when he puts the pin that low, it skews the core's dynamics, and raises his already high track and forces the core to flare the other way.
Normally, if you look at the diagram for the 315 degree drill, the pin position is much higher than MikeE's center of the grip, like under or right of the ring finger for a righty. This is why this drill requires a very short pin-CG distance AND, according to Mario, requires a mass bias core ball, like the Sahara or the Tsunami, and it requires a high weight hole to offset the high CG's finger positive weight (unless the starting top weight is very light). This drill is also a very early rolling drill.
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