I'm not by anyway an expert on this, but from what I am seeing this is the way I would do it and why. Provided I understand what you have done correctly, I would run the axle suppotr tube all the way through weldong it both sides of the square tube, this will equalise the load to both sides of that square tube thus eliminating most if any flex to the outside of the tube it is welded to. Does this make any sence or have I got it wrong as to what I am looking at.
TOM
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