I am trying to do that as well.
I came up with this stupid thing. You can try passing those variables to the next instance. And use them to create values just don't show those values, then you pass those values with the new ones you will get from the new instance.
I don't know if you got what i meant. :p
Also i am not sure if this is the best way to do it. Haven't tried it myself but i will
and i think it works. In theory it should. Any prof guys out there, care to give a hand?