Feels like everyone with a Synth character began with one of these excellent color-it-yourself templates made by the Synth creator himself, and my Tiamat-B is no exception. Here's the colored and somewhat edited template where she began, though her design has evolved considerably since then as I tinkered with my own various spins on the Synth chassis.

Many thanks to  vader-san for making the template I used here, and of course for being the absolute legend behind the Synths as a concept.