I used to have a Seemore but sold it a few weeks ago. Does SPI work with a non-Seemore putter?
It sure does.
Yes the SPi method works on pretty much any putter. As a matter of fact, when we were at Pine Lakes in October, the SPi instructor Chris Carfangia said how at one of the PGA tournaments he was at with Ted Galina of SeeMore, how a LOT of pros came up to say hi to Ted and knew him well. His point was that many pros use SeeMores as a practice tool even if they don't game them.