My son did end out taking one of the inserts as opposed to all five. He may or may not get to it as I told him of the current situation here. He said it would ultimately take him little time to CAD-up. He also wondered if just a blank would be enough, leaving the various size holes to be cut by the user...additionally he wondered if a blank could be created with punch-out circles added. I will update here if he finds the time.