rmwesley
Retro Guru
They are a doddle actually. The only potentially challenging bit is if the outer chromed casing won’t unscrew from the ballring. This guy has done a great step-by-step guide LINK so I just follow along with the pictures. It is generally good advice not to let your ballrings get seized in the first place thoughThat looks in great condition & are those things easy to dismantle & reassemble