Tips on sideskirt instal??

[Runninthepro]

In a few weeks I'll be installing mazdaspeed sideskirts and the rear lip. Any tips?? Anything you woulda done differently? I'm tryin to figure out the best way to mark where to drill the holes into my car...
Any tips would help! Thanks

 

[z31jaime]

+1 I've got the same project coming up soon.