A1 or A2 are the closest in my opinion but still feels nothing like pp. I was speaking to Austin Able a few months back about the new zo pucks and software and he said that the pull seems to be a lot softer. He described it like this in terms of the type of pull. "If pp is an an A, and the old zero off/pucks are a C, then the new zo if is a B". He also said that he went out at 36mph and it felt like 34mph. Sounds odd!