After all the wet weather John is concerned the ground will be too wet to start harvesting the corn in the next few days so the combine is being fitted with 4 wheel drive to improve the grip on slippy fields. This involved removing the rear axle and fitting a new one with different wheel centres. When I took the photo the rear wheels were going backwards when the combine was in forward gear and going forwards when it was in reverse!! They assure me it is working correctly now!