When I sail my laser, I always find it difficult to pull block to block for upwind legs, and when I manage it, it is hard to maintain tension on the line for long periods of time, it sometimes results in some wrist pain the following day. I sail an old 1981 Laser Standard with the original kit e.g. the 3:1 kicker etc. I cannot afford to buy upgraded parts right now to make it easier to sail. Any tips on how to make pulling block to block upwind easier?