I just obtained an older model 22cal. Ruger single six with the LR/Mag Cylinders. It has the target adjustable sites and some very real looking imitation stag scales. I love the flat top frame and the smooth crisp trigger.I understand that Ruger will upgrade this pistol to the new style trigger configuration, If I were to send it in, But I was wondering if that would detract from the collector value of this revolver? I also was wondering if the trigger would be as smooth when I got it back? Are the older models more or less valuable than the newer ones?