Thank you for your interest. Looking at the name freelancemachinist.com, it seems to me that your site is very similar to what we did in France. The site is www.usineur.fr . To see it in English, I guess you can try to use google translate.
The idea is based on the elance.com concept and applied to machining custom parts.
Actually, it's quite easy to translate usineur.fr into English. The challenge would be to find the right keywords to get enough visibility on Google.
The site has reached a fair success in the machinist community in France, it's recognized as the best place for individuals or small companies to get custom machined parts in low quantities. People are often seriously struggling to find a solution and the site is a solution to this problem. On the other side, machinists all across France are happy to get an easy access to orders and enjoy the simplicity of the site.
Simon