I'm not sure why you would wanna build 2 Foundries unless you are running an extremely large and active server. I've made one on my meager server, and after a week of service, I shut it down because I've amassed more than enough Iron to last the server for a very long time (unless everyone suddenly starts building with the blocks).
Please read posts before replying....
This is a 6-month old thread, which stated it's a 1.7.4 server, not 1.8.
You've also failed to link to a tutorial or video as was requested in the post.
Please me more mindful when posting here.