The tank on Lilia is still stock. The design idea I keep coming back to is an armillary sphere: rings crossing rings, laid out across the tank.

Lilia Tank Design: Armillary Sphere
Lilia Tank Design: Armillary Sphere

I haven't decided how it would get done, or committed to it at all. Phase 1 mechanical work on Lilia comes first. The tank design waits until that's further along.

Lilia Tank Design: Armillary Sphere