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You either need a mini suspension truck or something similar
take the back part off of the truck and ad on to it as shown
swap out the two yellow pieces with two orange pieces
it doesn't matter how this is made
attach the back part and then put the trailer on
Knex truck and trailerby KnexKreator
K'nex Trailerby knex365
K'NEX truck and trailer by Monkey pants
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