I have been researching this, but can’t for the life of me figure out what is going on. Has anyone experienced that the Point.Project node runs significantly slower when running Dynamo with Revit 2018 than 2017/2016? We have multiple workflows using Mesh.ToPolysurface(Springs) and projecting points to the resulting Polysurface and they have performed rather well in the past. After changing to Revit 2018, they perform significantly slower in the very same projects or hangs itself entirely. The results are the same on multiple workstations.