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I have a big Le Tigre black ebonite fountain 1918 pen ( made by Conway- steward), the cap of which is damaged. I can unsrew the top end of the cap and it turns out to be 13 mm single thread. On the lower end where the damage is the thread is a triple start thread of 13 mm. I would dearly like to restore this pen, but the price for the required taps would be some 450 € if I am not mistaken. I have the necessary ebonite, I have a lathe , I can do the single thread at the top end , but spending such a large amount of money for just one repair is stupid. Can anybody of you people tap this triple start thread for me?IMG_2956.HEICIMG_2956.HEICIMG_2956.HEICIMG_2956.HEICIMG_2956.HEICIMG_2956.HEICIMG_2957.HEICIMG_2958.HEICIMG_2959.HEICIMG_2960.HEICIMG_2961.HEICIMG_2957.HEICIMG_2962.HEICIMG_2958.HEICIMG_2958.HEICIMG_2958.HEIC

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