Structural calculations...

To be honest, when I was learning about mechanics in school, I wasn't very sure when I would use the knowledge.  But knowing the knowledge is there in the book is good.  When I need it, I can go back to the books and still make sense of it.  I feels fantastic.

Graham Wells has done a great job doing the calculations.  He is conservative in many unknown factors.  But I cannot blame him because he wouldn't have any idea how the work will turn out in reality.  So being conservative is good.

But I am much closer to the real work.  So I re-did the calculations with the real measurements in mind.  That way, I can feel where we are safe, and where we are closer to the limits.