Your records will be even more precious next year when you can start comparing your speeds/kms/ etc and check your progress. You can see which sail or board was the most used, which location, wind direction etc...I developed this record keeping to a maniacal level, not sure if it helped me improve, but sure gave me motivation and kept me busy on windless days.
Here is a comparison of 2016 with 2015:
martignoni.id.au/top10.php?year=2016&compare=2015 every number is a link to the session that produced it, from the session you can click to the location, board, sail and fin to get more info about those ones....
I don't keep spending records anymore because I think that whatever it costs , it is well spent.
Wish a great 2017 to everyone !