Your boat is 1981. It is old and tired. It has poor blades. It has a poor sail. You should not be worrying about buying class legal equipment. The reality is unless you are doing a serious race(regional, state, national, international) no one cares. At the end of the day there is no advantage to be gained buy using any of the generic parts. They simply cost less. The only thing other than adding an outboard motor to a Laser that would make it faster would be the sail. However, it is generally accepted that the generic sails offer no performance gains(they just last longer due to better sail cloth). So you have 3 good options 1.keep the boat you have and update with $400 worth of Intensity gear. The new sail, outhaul & down haul gear, maybe a new alloy tiller & ext. Spend a bit more for a new vang or modify the one you have with a couple of blocks and a $5 Dyneema loop(instead of a swivel at the mast). 2.Its probably not cost effective to replace your blades(even generic ones are expensive). It would be more cost effective to sell your boat and find another newer used/tired one that someone else has done the above. 3. Buy a really good used boat with all the legal gear and use it at the Worlds if you dare.