35mm is a good place to start..... Then tune from there. make sure you are using all the stroke but not bottoming to much. You also what a balanced feel.
Put a zip tie on the fork slider, slide it up to the top, bounce a bit and have someone slide it back up to the top for you while you sit on it. Compare that measurement to the one while it sits on the stand fully extended.
Keep the zip tie there to make sure you are using you travel.
