Thanks Jean-do, do you plan to buy it? I would love to see this rare and eccentric car owned and restored by a true enthusiast.
The rear wheel steering is odd, and something you would need to be careful about if you are going at any speed. When I made my Drum Car I decided to use rear wheel steering for several reasons: between the two front wheels I needed space for the two bass drums and their pedals and for the Hihat Cymbals and their stand and pedal, I think Hihats are called Charleston in French. Also stands for the drums were there and a structural mounting point. That left little room for front wheel steering linkages, and also if the 2 front wheels had steered the chassis would have been too wide to fit through doors.
I decided that RWS would be fine as it would never exceed 18 kph (keeping it within the law to use on pavements. One time testing it freewheeling downhill I was doing about 30 kph and it was like a first drive in a KR 200....uncontrollable swerving side-to-side, and quite alarming!
The RWS DID give it a great turning circle. This is brilliant when riving it in parades because I can aim at the crowd and get really close to them so they are starting to panic, and just when they are squashed up against a building and expect to be hurt I turn 90 degrees on the spot, and always get cheers and applause from them. So yes it is like driving a fork lift truck! great fun!