^^^ that's what I'd consider, going 30 over & locating a single piston & I believe OS sets are lightened to keep the balance factor the same (or close) as std pistons & if it is heavier (& crosses the line to where it needs balancing adjusting) you can trim the pin as BB pins have more contact area than needed & can easily lose 1/4 off of each end with no compromise to durability. HF has a gram scale for $9.99 or likely get one for free with the coupon with another purchase & they always have SOMETHING that you cant live without!