that's the best thing to do buddy, it's just about finding the right catty for you, everybody is different. Just try and find an anchor point to pull to every time I.e your ear, cheek, mouth, shoulder etc. that way you will be more consistent with your shots, then it's just finding a place on your catty I.e right fork, left fork etc to use as a marker on your target. Good luck, you'll get there mate