So I bought a fixer upper. A lesson in boat owning and repair for my 14 yr old son. Its got all the usual problems ( its heavy, missing parts, and leaks). After 2 weeks time all of that is taken care of. So I'm looking at installing a mainsheet block, eye strap and spring. It had these items in a previous life ( the filled holes are visible). I see that a stock boats comes with a harken 019, but the racing version a harken 2625. Big difference in price, but is there that much difference in performance? They both do the same thing, the same way. The loads on this block are not excessive( so robust design is not a major consideration). I would appreciate the finer points of this debate. Thanks