Masculinity is a tricky topic. Sometimes I think it's a silly catchphrase when it comes branded on a product (insert soap, deodorant, cologne...whatever) just to make a sale. Other times I think it's more of a personality trait. I've dated high femmes who were more masculine than me in their workplaces but didn't miss a beat when I open doors or picked up the tab at dinner. Since I started transitioning, masculinity has become more obvious to me as a archaic pecking order. I think most cis men think masculinity is about having bigger muscles or being physically larger...again silly. I think there's an element of masculinity where being humble is absolutely necessary. I tend to think people without at least a sense of that are posturing to bridge the gaps between their self image and their insecurities.
If you don't have anymore openings, good luck with your project. I love the idea!