Update, managed to get through crank sensor hole and "tweak" reluctor wheel teeth as best possible back in line afetr several attempts.Scope reading still slightly out but fault codes gone and engine runs ok..

Thanks was what i was thinking. Will let you know the outcome.

Hi vehicle is a Renault master 2014 engine code M9T870 . Has had a engine rebuild at another garage and cant rectify fault code DF026 engine speed sensor circuit. Fault clears but returns as soon as engine started. Have scoped crank/cam correlation and am thinking suspect damaged crankshaft position...