most of it is going to be welded, i will be bolting certain bits to leave room for adjustment

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i am nearly there now, my main concerns are do i really need the turquoise bit?? would i get away with using a bit of flat bar instead? i have enough room in my steel for that piece but only just so i would rather use something else and keep that length spare incase i mess anything up.

also anything wrong with the bed? i dont know what i am going to cover it in yet, i would like to say alu but more than likely it will start out as mdf