Flying Nutcases "Full Mission Builder Tutorials" website is not back online but thanks to his gracious permission they are available in the M4T Knowledge Base.
FMB Tutorials @ M4T: Mission4Today > Knowledge Base > FMB Tutorials
Hope they help the next generation of budding mission makers understand the FMB like they helped me.
I am fairly certain that we have all of them uploaded but if anyone knows of one or more that we missed post a link to the Internet Archive version of the tutorial and we will get it added to the KB. 8)