73 is interesting - people are worried it might be too tall for a business card or even the storefront sign (which is about 2 x 7). I suppose if the logo/name had different components - like a text/logo and then a watermark, it could possibly work. Need to know more about this. Otherwise, the shield may need to move to the background/behind the text.
Our members have mixed feelings on the shield - a few are worried that it might be seen as "improper" by the military members in our area, as in a rank patch, etc. A few like the symbolism of protection.