Hello,
I do not mean to intrude on your thread but I joined L4P to maybe help you avoid any issues in the future. Not sure if you have allready looked into the schematic of how the 5.0 V10 oil circuitry works but usually (for us) when we do relocation kits for Audi , VW or Mercedes-Benz we add an M14 check valve into the plate so as not to allow oil drain back. Might be a suggestion to look into.
Excellent build btw!