Can anybody tell me whether it is common for the speedo drive fitted to the bottom of the gearbox to leak oil?. I have two and they both leak. I intend to convert to running the drive from the rear wheel and have a rear wheel speedo drive ring so can anybody point me in the direction of where to get a brake plate mounted drive gearbox ?. By the way, I am showing the Scottish at the Pyemoor agricultural show this Sunday 8th July so if there's anyone in the Cambridge area who's interested please drop me an e-mail.