[RickPinewild]

Building a "strong, powerful, repeating golf swing" is like building a custom home. It starts with a sturdy, level foundation and floor (steady head). You'll also need strong, plumb walls (balance}, and a roof with good pitch (rhythm). The imperatives are the siding, roofing, windows and doors. You must have them, but you can choose them (components). Add some beautiful landscaping (extensor action) for curb appeal and you'll end a golfing machine.