1 Fan Speed
The fan speed needs to be on full speed as soon as possible. How soon you can activate 100% coolinf fan may depend on your printer, but in general the sooner the better. We want to remove heat from the material as soon as possible to stop crystallization process.
We recommend using a brim for better adhesion of corners which might lift due to internal shrinkage. We generally use 20 perimeter for a brim.
3 Retraction settings
On most 3D printers the retraction settings can be set a bit lower then you would for PLA. If you see small gaps in the outside surface of the print it might be a sign the retract values are set just a bit too high.