A. The BDH-512 uses a single double acting cylinder to place the two seeders in transport or field mode. An over the top swing arm controls the position of the seeders. In field operation, the center line of the tractor stays in line with the center line of the seeders. In transport, the complete unit is as wide as the widest seeder or implement it is pulling. An integral turnbuckle allows for adjustment of the overlap of the two seeders. With both seeders operating independently, the BDH-512 will require three remote outlets on the tractor.