When replacing my worn out old shifter I let my young bloke (21) put in
I said to him are you going to be right a to do it .do you want some tips, no no I'm right he said ,should have taken him about an hour .
Came back an hour later he still had not quite finished,"I just got to put the linkages on" he said 2 1/2 hours later and lots of swearing &curseing I got under to show him how ...