Reading sspenst's comment on DEM4, I tried to apply my 2 off in DEM4 in this level and that's the correct one. That is a brilliant route. My 2nd DEM done!
Gosh, this one gave me troubles. Was pretty sure, where the right path was, just couldn't work it out properly. Was mostly 4 off, and 2 off, before I managed to optimize. And there is a completely different 2 off, too! Great level! 52 tries. :D
