Rainy day and working on replacing some pitted shafts for a customer. Have noticed many havent seen how the adjuster works. Rebound speed is the sum of the Rebound Valving and any oil going around it. The adjuster lets the oil go around the valving in a adjustable manner. The gas pressure returns the needle against the pushrod when adjuster is backed off. This is why when shock loses pressure the click goes away on many adjusters. This is a Ohlins but similar to most shocks.