Turnin' Matoran into Toa

Or "Destiny becomes Duty."

At the suggestion of Snowy-Aegis, I took the liberty between classes today to show the internal difference between a matoran and toa of my visual canon (both of whom with Metru-style armor).

Surprisingly Matoran and Toa are not that different. If you recall to my last anatomical sketch of a toa's elemental systems, it is now apparent that the energy vat of a matoran grows in size and power for another purpose, the elemental system.

Another point of note is that matoran have a vestigial gear system (which they use like a post for ropes) that upon evolution into a Toa grows two more gears that complete the mechanism. While they can move their arms freely via a ball joint for their shoulder, they can lock their shoulders in their current position and activate their gears like an engine and shove them mechanically with much greater torque.