I have 2 questions i need to ask. One question is that i have the cm hyper 212 evo and its hard to put the back screws into the mobo so should i just install it once the motherboard is inside the case? The second question is that i have the gigabyte z97x-ud3h and on the back of the i/o shield it has like the silver sticker on top of this foam, do i rip that off or keep it? Thanks.