I’ve published an update, which includes a few more nodes for solid operations for API solids:
SolidsIntersection:
DoSolidsIntersect - the same but only returns True or False
SolidsUnion:
Also some other handy nodes, such as all 3 coordinates of a point and bulk get StartPoint EndPoint of a Line.
Still working on Dynamo to RevitAPI Solid Conversion. Wasn’t as easy as I thought 