Micheal Miller worked for BIMARE (I don't know if paid or unpaid) for several months back in 2015 organizing and managing many testsails for catsailors potentially interested to the S 9.
The fact is confirmed by the editor of Catsailingnews on his first report on the I Fly 15.
Following Stunt 9 path, Michael Miller, who used to promote the S9 back in Punta AlA 2015, has launched a new recreational foiler the I Fly 15
I personally met him in Punta Ala during the A class Worlds and he was all the time behind the S 9 spending warm and passionate words about the boat.
Then for sure when he started his project, he had a deep knowledge of the design and building secrets of the S9