there should be a small screw you can turn to increase/decrease the base pitch speed - i don't own technics, but i got a feeling it's on the inside of the casing.
my mate has done his, so i'll ask him later tonight - another mate had his done by a shop and they charged him £80 or something stupid like that ...
good idea upping the speed :D if only technics had the extra speed like me Vestax i would play on em more often....