Those Arbus Bordo series locks look interesting. The weight shown in Amazon for the 3’ 6000 is 2.6 lbs. I have been using an old Citadel U lock for years, along with a 6’ cable. On my little scale the lock and cable weighs 3.1 lbs., so for 8 oz. more I can lock up to a phone pole or other large item. I don’t like carrying the weight any more than anyone else, but I sure feel better that when I turn my back on my bike it will still be there when I get back.