Hello, I have a friend that moved and disassembled her wall unit which she bought approx. 15 - 20 years ago in Italy. She has lost about 4 pieces which connect the unit. I drew a picture of it and attached it. I hope you can view it. Can anyone please let me know where I can get four of these pieces. I'm located in Canada. Thanks in advance, Icando.

I'm installing 1/4" underlayment in my bathroom. The book I have shows to screw the sheets down, and screw the screws in until they're just below the surface (so I can level it and have a smooth surface for my new flooring). The problem is that the screws will screw TO the surface, but then they just spin in place. I can't get them to go in tight enough to pull the heads below the surface of the underlayment. I'm using 2 1/2" screws... I was using shorter screws, and thought the longer would do the trick. I was wrong about that. A guy at the hardware store said to locate the joists and screw into those, but I need to put screws every 6" around the edge of each sheet and across the area of the underlayment every 8"... I doubt the joists will help me with those spots.