For small models like the Ford Flivver or the Zig Zag, careful balsa selection, much fuse hollowing, and careful painting can lead to a very light model. The Blackhawk Golden Hawk is designed for the rough and tumble of day to day use, and rightfully so. It would work OK in the Musciano Team Race, but not so well in Stunt or Speed. Anyway, these heavier kit models are great for teaching kids to fly...and crash...and flly...etc.
If you work at it, a Zig Zag or Stuntmaster fuse can be as light as 10 grams, unpainted and no firewall. A typical Scientific 18", 3" chord wing also can be 10 grams. Together, this is only a little over 2/3rds of an ounce.
As an example, I have a Ford Flivver in Winter storage. Painted, no controls, no motor, no landing gear, but ready to go with 2-56 blind mounts, is 40 grams. This is about 1.4 ounces. This lightening is for contest use, and I wouldn't use it for Team Race. Currell