First, most manufacturers have released new models since our previous test so we would expect performance differences. Second, with this year's test, we've worked to improve the test parameters. Specifically, we felt our spin numbers were a bit low across the board in the iron portions of our 2021 test. The new parameters more closely align with launch and spin rates produced by the average golfer at each swing speed. Likewise, both launch and spin rates were higher than we liked for the high-speed driver portion of the test. Working with manufacturers, we updated our test parameters to better align with the real-world averages for golfers in that group.