Making a Super Tigre G33 Needle Valve

I bought an un-run Super Tigre G33 1.5cc diesel model engine, but it was missing the needle valve. So, I made a replacement. Its made of 1.5mm piano wire and an old brass bolt. It's very similar to an original needle, but not identical, so while it will work perfectly, it will not be mistaken for the real thing. Test runs to come...