The R&A has ruled that Twins putter does conform to the Rules of Golf. (ES2020-0128) STROKE LINE-RED LINE 9cm AIM LINE-BLACK LINE 6cm NUCLEAR SYMBOL- BLUE DOT INSET-LEXAN-BULLETPROOF MATTER SOFT-DOUBLE SIDED TAPE DOUBLE SIDED FACE-If you are righty and have yips, you can putt from left to right likewise back stroke in tennis. You need 1,000 practice. AB length=BC length, AB speed-BC speed, Ball B=Head B Direction depends on Twins putter. Distance depends on YOU. The above photo is Twins putter head. When arc putting, your eyes have to be above the edge of the red perpendicular line. At that time, the black parallel line is shown curve. When arc putting, you must...