I was having trouble timing one of my Avantis the other day. It just wouldn’t run unless it was up around 50 degrees advanced at idle. I thought the outer ring had slipped on the balancer . I took a wooded paint stir stick and split it then put it partially into the number one cylinder and bumped the engine over with a remote push button switch. I was able to find top dead center and was able to verify the balancer was clocked correctly while on the combustion stroke. You might try this method, it’s straight forward. Just make sure your rotor is close to number one plug wire and you are on the compression stroke.