This is a build based on Peter Holly's Atari 600 xl key stem. I needed the 800 xl compatible version. have re-created it and made adjustments for travel, proper fit to a keycap and a smooth travel in the switch body. Version 1 worked and is being used in my 800xl. I did make a new version to further perfect the stroke feel and travel, but is not tested. Both are included. Enjoy!