@mrgnstrn good point on the scaling factor. Keep that at 1 so your cut matches your file dimensions.
FYI: I found a hiccup in the gcode generated with gcodetools. In a recent gcode file generated, there was an R command for radius and maslow does not read them, so every layer faulted and to continue, it had to restart at the next line to continue. The reason why gcodetools generates gcode with the R command instead of i and j when it generates is unclear. There is a discussion about it here. Perhaps a script could search and see if any of those are in there or the open source gcodetools could be modified to not use the R command for maslow.