Since we're talking about rudders..... The rudder cable shackles on my 172G are showing some wear as thinning of the loops where they touch each other. I'm not sure why since no one uses them. I would like to replace the shackles and looked up the Cessna part number. They want about $100 per shackle for the original Cessna part and about $15-$30 for steel shackles from Wag Aero. Is there any reason to use the Cessna parts? Consider that there are 4 of them to replace.....