Hey guys, i ordered the greenstuff pads after reading all the various opinions and they are on the way. i plan on doing the changeout myself, as i know the disks are ok and within tolerance. is everything as straightforward as i think and it appears, or is there anything (hidden, tricky, etc.) i need to be aware of? i want to avoid coming here after the fact, if ya know what i mean.... far to often, i have seen phrases like "what they dont tell you is...." so i am asking before i start. thanks in advance.