Board mounts to the bottom using m3 screws. Top mounts to the bottom using m2.5 screws. I placed a few holes on the bottom to use m3x4mm heatset inserts for various mounting solutions. 3010 fan mounts with m3 screws and nuts. 

If using all 4 stepper drivers the fan will not fit! I'll make a version with a different fan…..sometime. I just had a spare 3010 so that's what it got.

.25 first layer height

.3 layer height

The rest is just up to you!