@Blake Elder , @Dmitriy Fomichenko is the guy you are looking for from the post earlier. He is very knowledgeable on self-directed retirement accounts with his company Sense Financial Services, LLC (http://www.sensefinancial.com/). I am currently setting up a Solo 401k with them that should be funded this week. They have made the process very easy and Dmitriy and his team make themselves very available for any questions you may have. Dmitriy is also very active in the forums with posts/articles about self-directed retirement accounts.
Do they offer the checkbook solo 401k?
@MarkNolan I believe they do. I apologize for the delayed response.