Hello, digging up an old thread - i know. im really trying to get this macro to work but it get an io error when i try to run it. Is there any workaround? or another way to edit the linearity.dat file? i just spent quite some time going through 100 different rpms and noting them. id love to get this to work. Would anybody be able to generate a file for me if i provided my information? im really stuck here =(