As I recall the FT's are supposed to be a better arm (actually there are a lot that may be better), but isn't there a difference in mass as well as arm shape? I have the MMT and I wouldn't upgrade it just to try to squeeze the last iota of performance out of an inexpensive cartridge. Mine works fine with a Benz Glider - I have no angst whatsoever. If I were going to up-grade it would be the entire system.
Leave well enuf alone. :-)
Leave well enuf alone. :-)