Comino sells a 6x 4090 box as a product: https://www.comino.com/ https://www.comino.com/ They have single-slot GPU waterblocks but would want something like $4

Comino sells a 6x 4090 box as a product: https://www.comino.com/ https://www.comino.com/ They have single-slot GPU waterblocks but would want something like $400 or more each for them individually.