Position both TRUVIS balls at each end of the black centre line printed on the template and just wider than the putter head width from toe to heel, this will form a gate.
Your goal is to not make contact with either of the x2 TRUVIS balls during your stroke. If you contact either one of the TRUVIS balls you will get instant feedback as to which side of the SWEET-SPOT you tend to strike your putts from.
If you make contact with the TRUVIS ball positioned near the heel of the putter, then you probably have a toe-strike tendency, and if you make contact with the TRUVIS ball positioned near the toe of the putter, then you probably have a heel-strike tendency.
- Off centre face strikes lead to inconsistent ball direction & speed control on the greens.