This talk is about joint work with Elias–Rose on a diagrammatic presentation of the monoidal category of type B fundamental representations. Our approach parallels Cautis–Kamnitzer–Morrison's skew Howe duality approach to type A webs, using Wenzl's quantum spin Howe duality in place of quantum skew Howe duality. I will emphasize connections to: $\imath$quantum Weyl group symmetries of nonclassical modules, and our previous work on folded categorified skew Howe duality.