This has probably been discussed before but I'm going to ask anyway...Been pondering this with how my irons have been the last couple of rounds. I've been practicing a lot with heavier shafts, Nippon Modus 3 Tour 130's, but the clubs I play regularly right now have the UST Recoil Dart 105s. Can practicing with a heavier shaft cause issues when playing with a lighter shaft? Could be over thinking things, but then I do everything, but just curious.