Rears are drum, I will take a look at them. What's the "nail"? I haven't really done a whole lot of brake and suspension work, so apologies if the answers are really obvious.
The noise sounds like it's coming from the front of the car, driver's side, whoch is the side I just put the strut on. It's a sharp bang with a sort of springy tone to it as well. If the car is not put in reverse, it will bang like this over the first big bump, and no others, like something is misaligned and is settling in, almost. Does not bang on hard cornering, even over bumps. The anti-rattle clip for the driver's side is missing (it broke), could that be the issue?