I think there was an article in a UK flying mag earlier this year in which flying both the Regent and Remorquer were discussed. One had the handbrake system and the other toe brakes, but I don't remember which was which. However, I don't recall the article flagging up the ground handling as being particularly difficult (it does have a nose wheel after all) so suspect A&C is correct. Something is fundamentally wrong with this particular DR400.