Thx guys I appreciate the comments as I have never took on such a project. Regarding the vents the one I had digitally printed in plastic is just not good enough, I either need to find another very good shape original or want to get a set made out of aluminium. I had been in touch with Aaron in Germany as he had sent me a video of an aluminum set that was absolutely spectacular but the guy won’t reproduce for only one set. I don’t know if anyone else wants to try and get a larger order together that might prompt him or someone else to do these. I do t know could they be cast? Rather than milled out of Billett?