[Hypermiler1995]

I want some opinions:

Shark fin antenna, does it help any, or just looks?
Has anybody removed the rear wiper and wished they hadn't?
Does the upper grille block need removed in the summer?
Should I put boattailing behind the front wheels, or inner and outer side skirts? (I live on a dirt road.)
What should I NOT cover with a belly pan? (going to use metal, no melting hazard)
What are the advantages of a scangauge over the factory prii system?
Current tires are Goodyear Integrity 185/65/15's are these Lrr, and what is better?

PLEASE POST MODS!!!!