Broken Tee Society Exclusive

20% off The Stack System

The Stack System provides dynamic programming directly from golf’s leading biomechanist, Sasho MacKenzie, with speed training secrets previously reserved for Tour players. 5 CNC-milled Stack weights combine with a custom-engineered shaft & hardware to create 30 unique combinations for unlocking dynamic variable inertia speed training. The Stack app has guided programs, timers, effortless data entry, and track key metrics on your speed journey.

About The Stack System Founder, Dr. Sasho MacKenzie:

Golf’s foremost biomechanist, Dr. Sasho MacKenzie is the research practitioner behind the world’s top golf coaches - his work and theories have driven a scientific, evidence-based revolution in golf instruction and movement training.

Sasho’s area of expertise is the training and biomechanics of speed generation. The Stack System allows Sasho to share his research findings and training wisdom directly with you, using the same tools, techniques, and nuances that he uses to speed-train Tour players he has consulted.

“The Stack tool and app are great. The app is easy to follow, and the workouts have helped my swing sequencing and club delivery. I am seeing significant gains after completing the foundation. I started at 81mph, and I’m now consistently around 104mph. I couldn’t be happier! From 245 to 295!!”

- Eric B., The Stack System user

The Index Experiment

We’re going low this year. You in? Join the Broken Tee Society to take part in The Index Experiment, where our members will receive a year’s worth of tools, technology, content and community collaboration mapping a path to better golf (and perhaps, a better life). All you have it to do is play, practice and share your progress.