Eric when you’re buying new Technics turntable like SL1200G or SL1200GR (those are the best you can get) a cartridge adjustment is very easy, because plastic
overhang gauge is included. This is
how it works and you don’t need a P-Mount cartridge.
There is only ONE thing you have to check, it’s position of the stylus tip, it must be
right under the mark on the overhang gauge.
Just buy yourself a brand new Technics from the store with warranty and be happy, it’s great turntable if you can afford
SL1200GR at least (or G for much higher price).
I don’t like Rega and all that belt drive crap they are selling for higher price than perfect Technics SL1200GR ($1700 in USA).
If you need a decent MM cartridge for your Technics i can not only offer you some of the best MM, but i could mount and align it for you not only with Technics overhang gauge, but also with Dr.Feickert if you want Baerwald alignment method instead of Technics method. I’m sure some fellow audiophiles can do the same for you. I own a few Technics turntables myself (and many others).