Take off the front springs and make sure they are the same size. Sometimes one will "collapse", and become shorter than the other. Also make sure all the suspension parts move freely, under their own weight.
Most F103 cars are built without tweak screws. If everything is in good shape, you should have no problems with the car spinning to one side or being "tweaked"
Also, is this a brand new car? If it is used, there may be issues with the t bar being stressed.