Harold Kestenholz
It can take some patience, but straightening the fins can provide some relief. The fins rub against each other and their carriers at times. Efforts to reduce contact with obstacles that the fins catch on is worth the time. The plastic carriers can be moved slightly to keep a fin from being next to the end of the carrier.
Baseboard pipe movement can be reduced by using a quality stand-off pipe clamp at the middle of the baseboard. You might have to remove a few fins, but it will not noticeably degrade the heat output.
Check that the riser tubes do not touch the wood as they pass through the floor, you might have to cut the floor 1/4-inch away from the outside of the pipe so the pipe can expand without binding and noise. The hole can be closed to passage by some silicone caulk.
