This actually surprise me on what I am attempting to do as I am still a mid-high hadicapper with only 3.5 years of experience, I don't think I can do 4 barrel, not even 3! I start learning TGM in Sept. last year and have been praticing 5 days a week for 1-2 hours. What happen is each time I learn a different thing, I can perfrom very well. For example, one month ago I was just (isolating on learning) performing hip slide, turn, shoulder rotation and no arms power, just let it happens. I can hit every clubs in the driving range, straight and far including the driver. Then when I went to play on a golf course, ossh! cannot move the hip slide first, somehow my arms were moving! I guess this inconsistency is due to not yet able to put everything together, still learning, and as you learn new things come in and the swing change.