The lifter is not about avoiding scratches . Even with the lifter you scratch the lip ( at least I do, and not only once, many times )
The lifter is about not being stuck in unknown situations ( as mentioned above ) or having to go side ways on numerous speed bumps .
If you use your GT2 RS only for the track , then I would not get the lift . If your GT2 is going to be driven everywhere , then there is no hesitation , get the lift to have peace of mind . The cost .... humm, 0.8% of the value of your car ....
I'm not convinced that even on the bumps the lift is helping...
But as with Porsche "less is more" is a principle :) So i will take the lift and make a 7kg diet
Just FYI :
Lars didnt had any lift on the yellow records breaking car.