Big shout out to Andrew over at huben3dparts.com great stuff and helped me get the build I wanted. Next Kelly at krazcool.com is the one to see when you want to purchase one of these, best customer service I have seen. I was excited to see what that could do as I also have the huben k1s but it being unregulated had me questioning a few things. At what fill was it most consistent in speed and how was the accuracy. Using the zulus and the stock made it much easier for testing. I wanted to see how many shots I could get from a 300b fill using hades 25.39gr and the jsb 33.95gr using the same tune. next was a test from a 250b fill which is more realistic in the field with a small buddy bottle. Looking forward to putting more time behind this.