Guerin rife IMO training putter?

The USGA and R&A aren't perfect. They've made snap decisions before. The COR Rule is one of them: the USGA freaked out when Callaway inadvertantly developed a driver with a spring-like face. I say "inadvertantly" because they were originally trying to make a high MOI driver; Taylormade was the ones that, after testing Callaway's driver, found out about the high COR. At any rate, the USGA flipped out; without any testing, they automatically set the limit at .83, with a tolerance. The R&A stood back, even allowing a non-conforming version of the Callaway driver to be played on the EPGA. Tons of golfers flocked to it, but by the end of the year it was virtually extinct. Why? The extra COR was of little consequence as it pertains to distance, but golfers found themselves in more undesirable places on the course. In essence, it worked itself out. Only after succumbing to pressure from the USGA did the R&A change its stance, but the point was still made(1). The average golfer, on the other hand, isn't taking full advantage of the .83 COR, let alone anything above that... they simply don't have the swing speed to. They get help, for sure, but for a 90mph swinger, it's only and extra 8 yards(2).

Same goes for the head shape of putters. You can have the biggest head on the puttershaft, or make it as long as you can, but YOU are still responsible for the outcome(3). The head will still open and close, regardless of the putter. You still have to be able to read a green, judge distance, make a decent stroke; even the long/belly putter doesn't do that if you don't rock your shoulders like a pendulum which, coincidently, is how you're supposed to swing a normal putter.