btw i forget to say the carb cleaning went without a hitch, after the linkage was removed, but before i start her up i want to replace 2 cutting blades whilst the oil and petrol is empty

i actually used a fine toothbrush i had lying around, the individual bristles are very fine, to '
stipple' in and out of the jet holes and it did the trick well, with no risk of damaging enlarging the holes at all...