Support for M579 / Dimensional correction for Deltas

This Gcode allows compensations of dimensional inaccuracys on deltas. I currently need to compensate x-2.8% on my slicer (I have no idea why). Would be cool if I could advise the Firmware to do that for me.
It is supportet in Reprapfirmware.
http://reprap.org/wiki/G-code#M579:_Scale_Cartesian_axes