Hi, The CR10 files from windmill have been scaled up to fit the Creality10 50x50x50 printer. Lets say you have a maximum of 149.68 mm you have to use scale factor 149.86/500 = 0.29972. You can use Netfab software to do the scaling and export the scaled STL's I like to warn/ point out the mill is still in a development stadium. I will be back when I have time to create a robust version that needs no tuning at all and fits in with excising dynamo/ steppen-motors.
Good energy results ask for a dimension of 300 mm and larger. Also danger is involved, the 500mm is capable of chopping of fingers during test runs! Good Luck!