It's becoming more and more apparent that an extremely stiff (even more than steel), stable graphite shaft that is made for a putter is becoming huge for various reasons.
The low torque of the p125 eliminates any head movement and keeps putts on the line that your stroke intended. The vibration dampening that Aerotech is famous for translates to a buttery soft feel on impact.
You could pay $425 for the LA Golf TPZ, but why? Available in .355 taper tip and .370 parallel tip, at 125 grams, 37" straight shafts only.