Encountered another workflow issue with Welding. It seems like I'm unable to get access to the Weights property of another Skin while I'm on a different Skin. This makes Welding new Meshes inconvenient, as I currently need to swap to the reference Mesh's Skin to copy its Bone Bindings and then swap to the target Mesh's Skin.
After checking "Show all skin attachments", and then selecting the mesh in a different Skin, it would be nice to access its Weights property for copying Bone Bindings.