It is this one: http://www.jab-becker.de/files/upload/TwinRam%2035_S2_40_S-2300_2010.pdf For installation one needs to dig about 3 m into the floor, since all the drive components are underfloor. The great advantages are: i) very flat arms, so that even cars with very little ground clearance take the arms without problems, ii) no columns so that opening of doors is possible in any height. The latter is invaluable, since you can e.g. work very comfortable in the footwell simply by lifting to the most convenient height and work through the open door in a relaxed manner. Not inexpensive, though, but has proven worth the expense. Thanks! Behind the curtain is a fully equipped bathroom. The red sofa is extendable to a bed and overnight guests (typically male ) sometimes like to stay in this place rather than in the guestroom of our living house.