For personal stuff you don't have to care about patents anyway. If the slicer can be modded to include this feature then there's nothing stopping people from using it. I'm not sure if just adding the feature in slicers would violate the patent, or using the feature commercially.
Also, if you're printing commercially, I would just go ahead and violate the patent. They are not going to find out, and if they do then just stop using the feature or negotiate a license for the patent.
Also, if you're printing commercially, I would just go ahead and violate the patent. They are not going to find out, and if they do then just stop using the feature or negotiate a license for the patent.