I am going with a ARC flywheel for the arma legal mower but I will be racing with an outlaw group that does not allow aluminum flywheels. I will be running a scatter shield 1/4" steel. I am all for safety, that's why I turned to you guys for the help. Guys, here me out. I take this sport serious. I am not trying to go cheap and save money. I am simply trying to gain and advantage and do better in a race while complying to the rules of the track. I am hustling hard to get the money to build a good chasi and put ARC rod and piston and flywheel on the sportsman. Thanks for your concern for my safety! That's what makes this sport so good, people really do care for one another's safety and well being!