You still cant spawn it middle in that object and have that condition that goes for collissions with that object. Spawning will not solve that. I dont know what you want to do with it, makes not sense to me. This is why i can only say something negative. Something positive, as in solving your problem, i cant. I dont like that myself, sorry.
My goals is that when a box enter the wrong tube, it is throw back from a central tube.
Man if you could just try to understand without being so negative. If you would have look correctly to my example you could see that spawning the object inside the trigger work great.
Please before saying something like you know everything just be sure that you are not wrong.