Here's a good comparison calculator: http://feefighters.com/square-calculator http://feefighters.com/square-calculator It's not possible to go below 1% becaus

Here's a good comparison calculator: http://feefighters.com/square-calculator http://feefighters.com/square-calculator It's not possible to go below 1% because interchange is higher than that... more details on that (what interchange is, why it exists, etc): http://feefighters.com/page/ebook_download?force_download=true http://feefighters.com/page/ebook_download?force_download=tr...