where are unit build times specified? in unit.script? i dont see any obvious reference to build times there.
They are in unit.script, look for the line; SetObjBaseSearchBuildVisionScore(objprop, objbase, 1000, 2560, 1, 20); the second figure (2560) is the build time, 32 = 1 second, 320 = 10 seconds etc.