Late reply, I know. I just saw this post.
If you can hold out a month or two, the new firmware/tuning software release should completely take care of this situation.
For same size injectors it *should* be 0x20 (in Hex) or 32 decimal for the rate to calculated PW in 1.0.69-1.0.78 firmwares, which IIRC yours is 1.0.74 or close to that.
There was a point where we changed it from a compile time option to a config enabled option, but I don't recall exactly what version that happened at.