Aircooled VW South Africa

Hi All, I'm thinking of replacing my Beetle's (1968) master cylinder as a precautionary measure as I don't know when it was last serviced.
I have heard all sorts of horrific stories regarding new master cylinders that leak etc.
Would you guys suggest servicing the existing cylinder or have things improved with Chinese parts etc?

Good quality new ones are available from various sources, but rebuilding the original ones by re-sleeving with stainless steel sleeves can be good peace of mind.

Most new cylinders come with a protective layer off grease inside the cylinders, I always remove the piston and wash every thing in clean brake fluid then replace the rubbers with a bit of rubber grease. Or just pour brake fluid into the piston and and pump it so the brake fluid flushes the cylinder out.

Good advice, Terry.