Yeah, I'll try compressed air. Then I think I have to take it apart, though it would seem this is a little bit more risky than I thought. Also I believed I had the tools, but seems I need more, like a heat gun. Those cables sound like a good idea.There might be something they carry in the local iPhone repair shop. Thank you.
Could you like leave everything but the technical facts rather than your view of Apple outside a guide like this one. Some us just want to repair without the fuss. Direct your frustration directly at Apple where it belongs or use forums where this is what people want to discuss. Please let the guides be about the repairs themselves.
Took it apart (Thank you for the new correct picture) carefully using a flat screwdriver to get an opening for my nylon tool, adjusted the screw — in my case it was clicking whenever so turned it a little bit to the right — then placed the rubber feet through the holes in the bottom, held the bottom at a 90° angle and placed the tabs, then folded back the bottom carefully pressing it back into to place with distinct but light force. This old thing is as new.