I also purchased the volthane target grips you see in the lower right. I have read in the forums from many people that have installed these that the kits really help make the trigger pull much "cleaner" or "crisper". To boot, I will now have pre and over travel adjustments, something I was introduced to when I purchased my Baikal pellet gun.
The items were purchased from Volquartsen over in Iowa. Now I just have to find a couple of hours where I can be alone to get this surgery done.