Dr. Charles Perry spent 28 years as an inventor for IBM in New York.Now a chairman at MTSU, Dr. Perry has turned his attention to automobiles and says he is about one month away from putting a hybrid conversion electric car on the road.Perry says the hybrid conversion technology is aimed at allowing everyday Americans to modify their gasoline vehicles without making major mechanical changes. He says the target cost for the system, once it gets into production, is $3,000 to $5,000.“This is something that’s only a little more complicated than a brake job,” said Perry to members of McMinnville’s Noon Rotary Club on Thursday. “It allows you to plug in and take electricity from the grid and it can fit in the trunk of your car.