Sorry to disagree with Mr Bachmann, but whist I am sure the company are working hard to redesign the gears in a cost-effective way, so that this beautiful little loco can be returned to the Product Line, the replacement gear sets that I have obtained from the Spares and Repairs Department are clearly different to those fitted originally. The shank on the line shaft bevel gears, which the ones that usually split, are much deeper, with more "meat" on them. I have never heard of a repaired Shay, fitted with the redesigned and stronger bevel gears, ever breaking again, in that area at least.