Thus far I have about 22 HL pieces and haven't seen any benefit in registering them with Harbour Lights.
I DID print out a copy of the complete list of pieces available on their Website and have started a notebook with that included within.
I've filled out the blanks, adding Date of Issue, Serial Number, and Store of Purchase, and have then highlighted that line with yellow.
I feel that a record is now being kept, but it's mostly for my own amusement.
------------------
Bob Steinbrunn
Nautical Research Guild