The original carpet has a metal beam in it, across over the top.
But if i have any heavy on the carpet it will bend down.. so i`m thinking about making a new floor out of 16mm MDF.
The board on the left and right is just put there now, and it is formed just like the original carpet but cut out where the system is. its a tight fit and it will not slide around back there.
The board :
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Well it will all be worth it in the end...

