Nope not your fault at all! Gapped em all and was all ready for the job.... BUT couldn't get no.3 or no.4 out...

my gay tool from Halfords was being obstructed my the strutbrace on no.3 and no.4 was in tooooo tight. I was about to get angry and vicious with it.
BUT just before I turned green I realised I was going to break something very expensive and so decided the Metro plugs can stay in a while longer!
Your instructions were perfect