Hello, #75 has the symbol in a bigger size; also I tried some adjustments on the text and the letter "N" for #76.
#77 and #78 are the black and white versions of the logos, as I can see your interest in those variations.
As part of the Logo Tournament contract, "the designer/vendor also agrees to provide additional variations upon request including: White Background, Colored Background, Black & White, and Solid Colors."
Thanks, :)
Mel