Flour Weight

So far I haven't given in and bought a scale cause it seems most recipes work out converting ounces to cups and eyeballing if the conversion result is a weird number.

Now for Alton Brown's Tres Leches Cake he calls for 6 3/4oz of cake flour which is roughly 0.84 cups. Is it fine to used 1c of cake flour or since the texture of the cake flour is different I should definitely try to be more precise?

Wonder if anyone has any experience with this recipe.

Thanks!