Thanks for that....
Someone has a full set of 4A-F cams, actually a full head, they could send me... But, considering the cost of a pro regrind, it makes little sense to 'fiddle around' without doing a Whole Head 'flow n fettle' job. I'm not going there.
I'm concentrating on getting the best out of the Aisan, redoing the vac hosing + checking the dizzy works OK.
4A-F