09 ms3 Oil leak after car is shut off.

So I’ve got an 09 ms3 gt, everytime I go out for a drive, stop and turn the car off the car leaks a bit of oil. I believe I’ve sourced it to being my feed and return lines both. Replacing both lines but are there any other precautions I should take ? I’ve read possibly changing to different banjo bolts ?

I just bought the car so not a whole lot of history from the prior own but it has a ton Cobb parts from what I see and apparently has 389whp from what he did say so I’d like to make sure I take all the right precautions.