Right well an update, took the cam out today and no.3 inlet lobe has had about 3mm taken off it

changed it for a standard cam now and she runs lovely, going to do an oil change 2moro night to get rid of the swarf that I know is gona be somewhere in there...

Only thing I can put it down to is the oil getting too hot and thin on the way into Trax...

Ah well another cam will be here soon with the head so onwards and upwards

Thanks to everyone for their suggestions