Hello. I have had my bike for about a month now, and I still can't figure out a comfortable way to carry my Kryptonite chain lock. I have tried carrying it in a backpack on my back, which causes back pain and in said backpack on a rear rack, which then makes the bike too heavy to carry up and down steps, which I have to do a lot. Right now, I have it wrapped around my seat post, which is the most comfortable but leaves big scuff marks on the seat post and I'm afraid I might be causing some long term damage, if that is even possible. Any suggestions?