The Idobo75 kit from YMDK comes with a coffee-brown aluminium case and backplate, and hot-swappable, QMK-programmable PCB. I'll be installing Kailh brown switches (because I have some, and to stick with the coffee colouring) and DSA keycaps. It's an ortholinear ‘board, which may take some getting used to but I'm hopeful that the extra keys (5x15 = 75) will let me add Fn keys as I miss those from the GK61.