For making your own flywheel steel should do fine. You're probably not aiming for an 80,000+RPM flywheel that rides on magnetic bearings. So composites shouldn't be needed. The best material, eventually, for flywheels should be carbon nanotubes. They have huge tensional strength, but lousy compression strength. Tensile loads is what a flywheel has, so they'd work great.
It is important to note that not all batteries associated with these computer models are affected. The company is directing all users to its HP Battery Recall website to go through the online validation and replacement process.
Common Problems for the 2005 Ford Mustang - Mustangforums.com. Ford Mustang V6 and Mustang GT 2005-2014: Recalls and Technical Service Bulletins Recalls and Technical Service Bulletins Read on to learn if Ford has issued a recall for your model year Mustang. This article applies to the Ford Mustang V6 and Mustang GT (2005-2014).