Alienito

I am currently looking for a cheap 400h to swap with my GTO mkII but I have driven one recently and what people don't realise is that the electric motors are always helping the engine via the CVT transmission. If only we could get a longer range. I can build battery packs for cars but I wanted to know how far the 400h community have gotten in increasing the battery range, are there kits? or videos? has anyone tried or found the connection points? does anyone know the max amps drawn from the batteries and max re-gen amperage? thanks