You dont need anything. I have the first gun from the second batch and they changed a few things on them. The changed the Reg to a bob long, they have more internal polishing, and are all tuned perfectly.
Very fast, shoots straight as an arrow, very balanced, great looking!
I cannot think of on one weakness that I have found yet.
This gun is great, it has it all. The great milling, nice color, custom grips, great reg, and of course the KAPP reflex trigger frame. All i can say is this gun is awesome! This is best cocker made for the money. It is great quality work, and I don't think there is anything better out there period. This gun is perfect!
I recommend this cocker to anyone who has $750 and is looking for a great autococker. I am dead serious when I say there is no better cocker out there. Buy one, you wont regret it!