For SESI I'm going to setup a colour guide for nodes, a guide you can refer to if you wonder which colours you're suppose to use. Since this isn't really defined, I wonder: What colours do you use? To give an head start, these are the colours that I use: VOP's Outputs data: Green (second column) Imports attributes: Purple (second column) Parameter controlled by user: Yellow (fifth column) DOP's Merge nodes: Gray (Second column) doesn't add or directly modify any data Switch solvers: Gr