My Reynolds 21, in anything over 18 knots of air with associated ocean chop, it just doesn't want to balance and gets extremely hard to drive. The helm gets so tight it requires a female bulgarian shotputter to move. Although the helm is relatively balanced, it gets very tight when boat speed is around 15 knots. I switched to nacra 5.8 rudders, worked very hard to balance the rake on them, worked hard to balance mast rake. The boat feels quite balanced and easy to drive in under 15 knots of wind, (light weather helm) the problem seems worst when reaching to broad reaching, especially when large breaking whitecaps try to drive the lee bow off. I have sailed on and driven lots of multis in similiar conditions so I hope I aint too dum a driver. Any suggestions on what is causing/how to resolve this nasty habit? Thanks!