OK, I switched the servo saver from the longer one to the shorter one and this really helped reduce the bump steer in the front the of the car, allot. I’m using a 9602 servo and mounted per the instructions, 30mm to the center of the servo horn. I didn’t use anything to shim it up. It mounted tight with the kit servo mounts and double sided tape.
I went to our local track this weekend and actually got to see a couple of the F104’s in motion. Everyone seems to be running the box stock set up. One person was running soft springs (silvers) in the front of the car to get more steering. But I never got the opportunity to see him run. On the kit car the rear of the rear seemed to chatter a bit exiting turns but I think that’s set up. A softer T-plate might fix that. I didn’t feel the person’s diff; it may have been too tight.