Impreza Sport SOHC Cam belt change
 

Could someone tell me where on the SOHC the alignment marks are on the Cam sprockets?
I need to remove the cam belt to replace the Crank/Oil pump oil seal, but can't see any alignment marks on the cam sprockets.

Looking at the Scooby manuals online, they suggest that there is a notch in the cam sprockets, but I can't see any on my car. Are they at the front or rear of the sprocket, what do they look like exactly?

Incidently the white line marks are still on the belt and if I align them to the notches in the back cover, I find that the line for the crank sprocket is one tooth away from the small triangle symbol on the sprocket, which I assume is the alignment mark! Does that sound right?

Can anyone advise?