David Palmer has been with Black Knight since 2008. He helped develop the ION series of squash racquets. His first signature model was the Black Knight Ion Storm. About the author admin Related postsBlack Knight …July 7, 2013Watch this! SquashJuly 7, 20132013 – 2014 Black Knight CatalogueJuly 7, 2013Squash Raquet ReviewJuly 7, 2013What i have learned …July 4, 2013Black Knight Ion Cannon Power Surge PS SquashJuly 3, 2013