Here is a holder to put my PC under my desk. With this I was able to fre some space for my tools. Rectangular hole is 180mm (7 1/16 inch) wide by 381mm (15 inch). My PC is 175mm (6 7/8 inch)by 365mm (14 3/8 inch). I've printed it in 1 piece on a 400mm x 400mm (Mingda Magician Pro). I print it with Matter3D PETG - carbon fiber 15%

UPDATE: Added a brace to add more rigidity to the kit

Enjoy!!