Attach PAR-T to the LOWEST part of your putters grip. Check and make sure the acrylic rod lines up Parallel / Level with the ground and has a 50 / 50 ratio.
DO NOT CHANGE YOUR PUTTING STANCE (at ADDRESS) OR YOUR GRIP, AS YOU BEGIN TO USE PAR-T / acrylic rod, KEEP EVERYTHING THE SAME. This will provide you a great 'baseline' to begin your own putting journey to become a more consistent putter.
Start using PAR-T / acrylic rod as your own personal 'GUIDE' to find 'THE HOW' you are currently moving your putter. Once you are able to SEE 'THE HOW' you are moving and tracking your putter to your intended Target Line, you are building yourself a 'Point of Reference' to make any slight changes necessary to your current putting stroke.
With PAR-T / acrylic rod attached correctly to the LOWEST portion of your Putter's Grip, take your normal stance at ADDRESS and begin your putting stroke. You'll immediately SEE 'THE HOW' you are moving / tracking your putting stroke. SEEing 'THE HOW' your putter is moving is KEY to getting comfortable and making any slight adjustments needed to help you become a better putter.
The picture labelled RIGHT (below) is a fantastic visual example of a great setup, so you can begin to see the 2" - 3" GAP / SPACE and start forming your own set of RR Tracks in your 'Mind's Eye'. Now that you are setup correctly (based on your Stance at ADDRESS) tapping into your IMAGINATION, is the next most important part of your journey. Open your 'Mind's Eye', and begin forming your own set of RR Tracks. Building Railroad