325 - 285 = 40
35 - 25 = 15 / 2 = 7.5
40 + 7.5 = 47.5 pund corrector weight.
Crew + corrector (285 + 47.5) = 332.5
Best place in the hull just behind the main beam(if you have access) half the weight in each hull. Attach with line to dagger board well.
Second best is at the mast base attached to the from cross bar.
Soft Dive weights are best. Cheap alternative is lead shot gun shot. These will not damage body or boat.
What's this part?
35 - 25 = 15 / 2 = 7.5
I like his math.
I get used tire weights from the tire dealer ( it is getting harder to get them) melt them down and pull out the steel clips. I melt them down with a propane cooker and a propane torch using a ss pot. Make a mold out of wood or metal and you can cover with tin foil. I make mine about 1 1/2" wide and as long as I need to get the weight I need. You can also do different thicknesses. I tape mine to the dolphin striker strap and have never had a problem.