>>186i made it with a routing template, which i cut on a scrollsaw. unfortunately my template was too small by .4mm so i had to use my chisel a bit, which made it look a bit messy on the inside, when i get around to it i will make a version 2, with avoided mistakes and added palmrests.
well, trackball location depends on usecase and usage, if i play a game or do something in gimp or blender, i put it to the right side, if i browse, chat or do anything that allows me to use keybinds, i just have my trackball in the middle. if you ever get around to doing the embedded trackball, please post it here, i am very much interested, i want to mod mine a bit as well.