Thanks for any replies......
Outboard tech - these are the guages i have :
Firstly i tested each guage on cylinder 4 to make sure they were all reading the same, then set the tickover to 1000 and matched cyl 3 to 4, re-set the tickover and matched cyl 2 to 3 and 4 ect until all carbs were reading the same at the 1000 rpm
I got all the large and small jets out of each carb except for 1 of the small ones which i cleaned and blew through as best i could.
I have not touched the Idle mixture screws at all, but my manual says they should be set to 1 turn out.