P Dron ref horizontal steering arms (track rod), well you spotted the problem then, they should not be horizontal of course in this installation.
Consider the lines in 'front view' through:
1. The inner and outer pivots of the top wishbone.
2. The inner and outer pivots of the lower wishbone.
3. The inner and outer ball joints of the trackrod.
Well they should all meet at the same point, so that the initial movement of them all is on one arc. So then the length of the trackrod has to be related to the lengths of the wishbones and the position between them etc etc.
Nice drawing though - PJB.