Has anyone considered running a hybrid TT? The reason I ask is because the fastest cars in the world are Hybrids (Formula 1, 918, P1, LaFerrarri, etc). Given a TT already weighs a few tons, a battery pack wouldn't make nearly as big of a difference as it does in these light weight vehicles. The advantage is the full torque from low RPMs. Obvious downside is these systems are not cheap.