Has anybody fixed their hourmeter?

The tach is bound to be a magnet & drum setup like an automotive speedo. I'd figure that the hour meter would be like the odometer section of the car speedo, which drives through meshed worm & straight cut gears. That means that barring a simple dislocation from an impact, you're going to be looking at some replacement gears. Some of the classic speedo restorers might be your best bet. They're sure getting to be a dying form of art these days though. I useta work salvaging defective instrument clusters for a manufacturer. Could get my buds a 'retouched' odometer at trade-in time, until the digital jobs with the tamper-proof chip came along.