Thanks for pointing it out, but i did post about making an alteration to these as I thought it would make a stronger weld a little while back. Instead of the outer rails just butting up end to end I think I can get a stronger weld with everything butting up at 90 deg to each other, all I have done is increase the length of the crossmembers by 50mm and decreased the outer rails to compensate. All of my diagonal dimensions are exactly the same as the book so I can't foresee any problems, boy you guys don't miss much
Arfon
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