All blades have the same size, 36cm long, aerodynamically well shaped. But. The first weighs 120g, the second 125g… And the third one 210g… This is a small problem. So what are my options now? Making a new blade would be the last option, but do I have any other options?
Take some sand paper and grind a little off of the heavier ones? (No idea if that would ruin your aerodynamics too much)
Yes, I'll try a mix of grinding and hollowing probably.