steering gear box

I am gonna have the gear box checked out because it has totally no return to center and it has wander and the steering feels light.The steer safe that I installed helps a little but I think their is something wrong with the box.I have had the steering checked out once already and have replaced one inner and one outer tie rod and drag link.I put a supersteer bellcrank on the left side and replaced the power steering pump.I replaced the stabilizer shock on the right side idler and koni shocks all around.Added +5 on the caster when I did the alignment.I put new tires on the front and had it weighed and properly inflated.Replaced the coil spring airbags that was busted.I am gonna check the idler arms because when I had the steering checked they said the idlers had play but after greasing them they said it tightened them up.I don't think it is that simple so I will be checking that along with the box.