Moin Together. I replaced the tacho disc. The ring has to be carefully dismantled and re-assembled. However, this one is bulged. After the conversion the tacho was of course leaking. Now it was about 3 months good. Now the tacho doesn’t work anymore. First the watch didn’t work, now it doesn’t work anymore. Speed indicator is out and the display shows “NO CAL”. However, the tacho lighting still works. Can someone tell me if I can use a has to order new tacho or if there is anything else to save? Thanks already in advance…