I am wondering if it would be practical to get a backspin effect (like you would get with a Tippman flatline or a BT apex) by sticking a short piece of foam tape inside the tip of your barrel? It would probably take some time to "dial in" how much tape to use and where to put it. It would also likely be dependant on the size paintball you use and the length of the barrel , and about a billion other factors. It is just an idea that has been tripping around in my head for a couple of weeks now and would like some opinions before I waste a case of paint testing somthing that could turn out to be a waste of time.