I'm trying to clean and upgrade my G4 iMac. Following the iFixit guide, but I'm stuck on step 5. The bottom housing simply won't come loose from the front. Pulling harder is flexing the bottom too much, so much that area with the Airport card and memory flexes and separates from the rest of the housing. Shining a light in there it almost looks like the heat pipe isn't separating from the upper housing. Is this even possible? Anyone encountered something similar? Any advice? I'm worried about pulling any harder because the flexing really doesn't look healthy.