Keep the free swing and work on timing form there, i went to Bill Hall for about 9 months could not afford him plus with all his trips to russia could not get good feel for his changes anyway. So i have kept the grip changes which is he is awesome at figuring out and the 5 step approach i was a 4 step before but for me setting the ball in the swing so fast was too tough for me. With 5 step it is easy effortless and natural i just walk start the free arm swing and let the ball do the work. Remember too many changes too fast are usually much more than the muscle memory and the brain can remember when you are used too an old method from many years of repeating. I will grab my ball set myself up within a few seconds clear my head look at my mark and just go whatevever happens from there i will live with until the next practice session. I bowl two leagues  week and one practice seesion a week i find it easy too do when the pba show is on i watch it on monitors and just work on one or two things Bill Hall worked on with me a week. I kept all the worksheets and just reread them and work on mechanics from there or sometimes if everything feels good i will shoot spares only the entire 5 or 6 games i practice. It always make it fun when someone asks you if you need help because you cant hit the head pin because you are shooting ten pins and do not realize what you are upto.