I bought myself a Blast analyzer on Amazon for $120. I took it to the local golf shop and spent 2 hours testing just about every putter. I've been hitting a blade and closing the face too much. Turns out I hit a face-balanced mallet much straighter - a lot less dispersion and more even tempo. This will give you a good gauge without having to change your stroke. I ended up purchasing a Spider X from them. The Blast will continue to help you with your putting stroke and other clubs as well. Well worth it.