I've run 4 cycles over the course of 3 years, and every single one of them I've ran test E. Until this year when I decided to make the switch to cyp. And I got a horrible pip, everytime. I ordered filters and new vial from gpz, along with safflower oil from Med lab. I then proceeded to cut and filter my gear into the new vials. I basically added another ml of safflower oil to each of my injections. The extra oil allowed the hormone to disperse throughout the muscle more efficiently. I still had some pip, but it wasn't nearly as bad. I could walk again. This technique also seemed to eliminate the tumor sized swelling from the hormone not dispersing. all in all it worked great for me.