The heart of this question is whether or not a vestigial arm would count as a free hand for the purposes of the magus' class features.
Based on reading the previous vestigial arm thread my interpretation would probably be no.
The ruling on vestigial arm, says that it can not create extra attacks.
Yet, if it counts as a free hand for the purposes of the magus class features, then what stops a magus from being able to two weapon fight with spell combat... Which, effectively gives the magus an extra attack.
Interpretation, comments, questions, general discussion?