You would like to have a twin, which would help you to pass the puzzle? This mod will show how to use a time machine to create his counterpart from the past that will help pass the puzzle.
Portal 2 Thinking with Time Machine. Test 4
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Description
First test of the "Time Machine".
The Aesthetics are terrible
but the map is very interesting.
You should port the original Button model from Portal, I could do that if you need. It would fit in with your time machine I think. To use Portal 1 doors and button mixed with Portal 2, like you did with textures. Very very nice map, it's impressive.