Yeah! FriarJohn & I agree. I also use a digital caliper to measure but I read from the front end of the adjuster bracket to the front of the axle slot on the swingarm. Then I verify my chinese caliper with a Starrett vernier caliper from the rear of the swingarm to the end of adjustment bracket. This works if you're a bit anal. always spot on.

Ride Safe, Dennis Triumph, it's how I live and what I ride.