There were custom tools for punching this hole in the exact right place, but you could also just freehand it. https://content.spiceworksstatic.com/service.commu

There were custom tools for punching this hole in the exact right place, but you could also just freehand it. https://content.spiceworksstatic.com/service.community/p/post_images/0000129187/563b1bbd/attached_image/commod21.jpg https://content.spiceworksstatic.com/service.community/p/pos... The really cool trick on an Apple ][ was eeking out an extra 14% storage by modifying your drive to use 40 tracks instead of 35. Everything was designed to work with 40 track disks but for some reason the standard Apple ][ disk drive had a piece of metal physically preventing the disk arm from moving past track 35. You could bend / cut that out of the way and get 40 tracks. Even more if you hacked your software and trusted the disk media beyond track 40. But that was dodgy, up to track 40 was mostly safe. Except it broke a few copy protection schemes that would slam the disk arm all the way to the outside and expect that to be track 35.