I've also got a Knockbox. They stopped selling them with the case, so I made one. Fits perfectly. I will include that for another $75. I bought it and never used it. http://www.pocketlogger.com/index.php?pid=kb_det
They list 2 different versions of the Knockbox on the website. Do you have the standalone or the one that goes inline with a pocketlogger cable?