It has been some time since we’ve seen a drill decked out in Simba yellow, with the last Free Flow shipped from the Sleaford factory in 2004. Much has happened in the interim, however. A buy-out by US manufacturer Great Plains, and former partner Horsch going its own way, have prompted the Lincs-based firm to develop the currently under evaluation Centurion seeder. Mervyn Bailey catches up with the test machine