Hey guys, I hope this isn't becoming annoying for you guys, but I have another question.

I'm trying to swap over the plastic surround from the yellow car to the green one, but I'm having trouble getting the vents off so I can get to the screws up top. I know that it's only held on by a couple of springy clips, but I can't for the life of me get them to disengage. Is there a trick that I'm missing here? I feel as if I'm going to break something if I pull harder.