Is there an added cost for the brass nobs? I'm so excited to bring my bones back to life. My second generation bone has sentimental value but that top arm assembly is hard to pass up. I've been on a rope wrench for a while since both my bones have gotten to the point where they can't be adjusted to grab the ropes I used. I should send a picture of the brass adjustable bollard, that one took some wear since it doesn't move.I do have them in stock (a few). They use the same 8-32 stainless steel machine screw also as the rubber nubs. I use red locktite on the threads, but you can turn out the old by gripping the top of the old stud with vice grips.