Well, turns out I accidentally switched the components where I was looking for bones; instead of trying to find the sockets in the receiver (which has 7 sockets) I was searching for them in the grip (which has 1 socket), and no error was thrown that no such sockets with the names I was looking for were found, so I didn’t even know an issue existed until I listed off the sockets each component was supposed to have and compared it with what was expected. It also seems I got the bone orientations wrong in-editor, and so am manually modifying the socket rotations to be correct.