Feedback on a dual RTX 4090 build

Feedback on a dual RTX 4090 build 2 slot 4090 The ASUS GeForce RTX 4060 Ti DUAL SSD has an on-board slot, which has been used to run a GeForce RTX 4090 as an external graphics card 25h slot Custom-made Single Slot GPU Bracket; GPU To leak test the EK-Quantum Vector² water block, EK recommends bars of pressure for 2 minutes

25h slot MSI GeForce RTX 4090 AERO 2SLOT 24G GDDR6X Turbo Graphics Card ; Quantity 7 sold 15 available ; Item Number 374741742791 ; Brand MSI ; Connectors DisplayPort,

20mm slot drill MSI GeForce RTX 4090 AERO 2SLOT 24G GDDR6X Turbo Graphics Card ; Quantity 7 sold 15 available ; Item Number 374741742791 ; Brand MSI ; Connectors DisplayPort, I had my finger firmly over buy button for the 4090 ES Reference Design block, until I noticed dreaded is not compatible with FE Two