I would have thought you would be able to read the top graph would be OK.... I get about 17 g. for the long travel, 34 g. for medium travel, and 52 g. for short travel.... The corresponding travel distances, calculated from (sqr.rt FPE) which is 3.46 would be 3.46 /5 = 0.69", /10 = 0.35", and /15 = 0.23".... Any combination where hammer weight (grams) x hammer travel (inches) = 12 (FPE) should be about right.... Bob