Yep the foam is the foam behind the external grill, I only suggest taking the grill off, removing the foam which is easy and reversible in a flash. So you can have a play, I ended up putting mine back.
Yep I am waiting on a 430HA but that's for my partner so I can get her off my system. Its an entirely self centred move
Do I need to worry about those wires touching the grill?