I think it should be a specific number....there is only one spot that aligns the coils et al as it was designed.
Why do cartridge manufacturers give a range for VTF?
My Sussurros' manual says 1.8 - 2.2 grams. I know that Lyra, particularly the Delos has it rated at a very specific number. Just wondering, It would seem that the stated range would be very narrow.