Gen 1 addon?

Na I don't think you're a worry wart, I worry about lots of things being an owner of both gen1 and gen2 cars. I have also seen the aerodynamic aftermarket additions and if anything it would gain you maybe 1mpg more from altered airflow, but you know anything you hang on there will if anything be lower to the ground then it already is.
The worst worries I've got right now are both in the gen1, the battery electrolyte leakage causing a short to the metal case right under the back seat, and of course you've probably seen my inv. coolant pump/flowsensor experiment. It would definitely warn you quickly like when on the highway etc...much more quickly than the system will. Heck I've seen horror stories where inverters burn up with NO warning until after the fact. So it could save $$$ keeping your inverter intact.
Most significant failures besides 12v battery, heater failure etc. occur in the summer when it's hot out, so that's probably a good thing for the gen1's.
Those are two of my worries, hey guess that means I don't have any worries in the 06'.

 

The more common modification is a block for the lower inlet when the temperatures are low. This reduces drag and allows the engine and transaxle to stay at hybrid operating temperatures.

Mine is already back on the car and consist of a large 'water noodle' split with notches so it can bend around the air inlet. Some small bungie cord holds it in the slot and I wrapped the front side with duct tape to make it look a little closer to the black color than the blue spongy, water noodle.

Bob Wilson

 

Thanks Bob,
Yes I think I will be trying that this winter.
T