hello,
I'am building the 2 and 3 trailer from wood.
The dolly I make from aluminium.
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The "bridges" , I don't the real name , between the trailers. They have to work.
I use old servo's with a spindle to open and close the "bridge".
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The problem is to let the different parts open and close in the correct seguence.
It start to open with the first part the floor after that the two sides.
But to close it, it has to start with the two sides.
Also a problem is that the floors off two trailers overlap each other, so they cann't start equal.
I do think some electronic will do the yob.