A slight hardening of the suspension would require a slight increase in VTF, so that "cartridge coils will stay 'perfectly' centered", as Raul put it.
You say "It didn't sound bad, it just didn't move me the way it had in the past." This seems consistent with your findings: the Kiseki is an older cartridge, and your slight .25g increase restored the original positioning of the coils.
You say "It didn't sound bad, it just didn't move me the way it had in the past." This seems consistent with your findings: the Kiseki is an older cartridge, and your slight .25g increase restored the original positioning of the coils.