In the size of RC sailboats that I enjoy building (Star 45, my Salish 475, Vintage Marbleheads, maybe someday an East Coast 12 and others... all between 45"-60" LOA), it is tough to find rudder control arms that fit a 1/8" rudder post. It's virtually impossible. Recently I found a website that showed how they made their own. Today I tried it and it worked really well! I'm simply horrible at metal working, especially soldering, but after a few mistakes I finally got it to stick. Here are my first tries. When I finally get around to building the actual boat, I will make better ones. But this at least proves that even someone as solder-challenged as I am can do it! Click HERE to go to the website I found. They were working with 1/16" shafts, but the steps are the same for my 1/8" shafts. There is also a nice discussion on RC Groups about rudder control arms. This is another example for an RC hydroplane . Then I found someone else, and I can...