Tri axel Kenwoth

I'm thinking of altering the W900 chassis to make a tri axle, has anyone done it before, any pictures? i wondering where the best place to cut and add chassis rail, does the line in the pic look ok? just fore of the crossmember,  any tips etc much apprecieated,

Source: http://cs.scaleautomag.com/SCACS/forums/thread/1020542.aspx

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