Thanks for the info, Is this a good replacement needle? https://www.lpgear.com/product/SHSM0024H.html
Personally I would stick to an original if you can find one..these replacement needles may not really be shibata. I believe the only authentic shibata styluses still made are from a company called Jico but I've never used one.
I've gone through many a CD-4 cart over the years and the M24H was one of my favorites (as you can tell from my avatar)...unfortunately it's pretty worn out now. I recently switched to a JVC 4MD-20X with a NoS ATN14 and my setup has never sounded better.
Good luck setting carrier and separation controls! I hope you have a good test record and a screw driver