Help with aftermarket PDC please

[chrisp17283]

Hi all i don't currently have pdc and was going to add in a sensor system as they are so cheap and easy to fit now. I'm getting my bumper sprayed anyway so I'm happy to drill it and mount them before so they can get overpainted.
Can someone help me by measuring the height and position along the bumper of the original sensors so I can fit mine the same as it's a proven place to fit them or Audi wouldn't use them!!

Thanks in advance