Do yourself a favor and just buy a newer kite that goes with a depower set up...if you are experimenting with a C kite with a new set of lines and depower bar you are looking for trouble...I have seen the damage....
I wear a 3mm spring in the winter here in Maui....I am a skinny dude and get cold quick...none of my friends wear a wet suit in the winter here...yup no wind this month...been SUPing the waves waiting for some wind...Hopefully January is better?