The layout of the mower seems to be different for the short-shaft ones Millsi: I think with the short shaft the clutches are offset toward the side of the mower, which leaves room for the battery in the space that used to be occupied by the unnecessary bit of the long shaft.
It will be interesting to see how the automatic tensioner works without a ratchet. The ratchet is needed because when the mower is moving in one direction, the belt tension to drive the mower is being applied to the idler pulley, while in the other direction the pulley is on the return side of the belt so there is almost no belt tension applied to it.
