Ball studs and rod ends

[MADMAX79]

Can someone please explain for me how to replace the rod ends and the ball studs with something better like RPM or Losi. I'm running with the original plastic stock now and the drop off from the ballstuds all the time. I would like to keep the original titanium turnbuckle and just replace the plastic and the ball studs. I have read some threads here on oople but all seem to have such different ideas and I am rather confused on what to buy. I want something that goes straight down. Can any kind soul give me some good tips please.

BR
Peter