The problem about threading that hole is I was stupid, and drilled the hole before I measured how thick the material of the shroud and mhs section together. So the hole is already to big to be threaded now. Would you rather suggest drilling a larger hole through the shroud for the nut to fit in, or drill a larger hole through the mhs section for the recharge port to fit in higher up? A minor problem about drilling a larger hole is that during the drilling process, the material around the hole sort of got fused together. It would be a little difficult to remove the shroud now.